JP2565012Y2 - Vehicle seat - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat capable of reducing fatigue when sitting.

[0002]

2. Description of the Related Art Conventionally, as a seat of a vehicle such as a passenger car or a sightseeing bus, a seat having a built-in reclining mechanism for tilting an entire backrest to the rear of the seat is known.
When sitting in this seat, the seated person leans the entire backrest to the rear of the seat as desired, and sits down.

[0003]

Conventionally, as described above, the backrest is generally tilted to the rear of the seat, so that when the seat is seated, the upper part (neck, head) from the shoulder blade portion of the seated person However, since it does not contact the backrest reliably, the load of the occupant himself tends to be applied to the scapula portion of the occupant, and the occupant becomes tired.

[0004] In addition, in order to protect the scapula portion of the seated person, there has been a seat in which the upper portion of the backrest is inclined to the lower front portion of the backrest. However, even in this seat, the backrest is entirely behind the seat. The load on the scapula portion of the seated person is reduced somewhat, but it is not very effective,
Another problem is that it is not possible to adjust the inclination of the upper back from the shoulder blade portion according to the occupant's preference.

In view of the above drawbacks, the present invention reduces the load on the scapula portion of the seated person, and tilts the upper part of the backrest toward the lower front part of the backrest according to the preference of the seated person. In addition to providing a comfortable vehicle seat,
In addition, smooth operation of tilting the upper part of the backrest and its operation
The purpose of this is to make it easier.

The vehicle seat of the present invention is a reclining
With a mechanism, the upper part of the back rests toward the lower front of the back
In a vehicle seat that can be tilted freely,
Is divided into two parts: the lower back body and the upper back body
A fluid pressure seal is provided on one side in the width direction of the lower backrest body.
The cylinder is fixed to the cylinder of the hydraulic cylinder.
Head and the upper backrest body are connected via a connector,
The pivot point between the backrest body and the upper backrest body is used as a fulcrum.
The upper backrest body tilts in response to the rise of the cylinder head.
It is characterized in that it is provided so as to be free to fall.

[0007]

The operation of the present invention will be described.

When sitting on the vehicle seat according to the present invention, the entire backrest is tilted rearward of the seat according to the occupant's preference.

Next, the upper part of the backrest is tilted toward the lower front part of the backrest according to the preference of the seated person.

When returning the upper part of the backrest to the original state,
When the seated person applies a load to the upper part of the backrest by its own weight while sitting, the upper part of the backrest returns to the original state.

Therefore, the upper portion of the backrest can be reliably brought into contact with the upper part (neck, head) from the shoulder blade portion of the back of the seated person, and the load applied to the shoulder blade portion of the seated person can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the vehicle seat according to the present invention is a seat provided with a backrest 14 capable of reclining with respect to a seat portion 12, and an upper portion of the backrest 14 is provided with a backrest 1.
4 is provided so as to be tiltable toward the lower front part, and its configuration will be described in detail below.

As shown in FIGS. 1 to 5, the backrest 14 has a lower backrest body 16 and an upper backrest body 18 which are vertically divided into two parts from the contact position of the scapula portion of the seated person. The main body 16, 18 is covered with a cushion material or the like, and the outside thereof is covered with a cover or the like. The upper main body 18 is attached to the upper part of the lower main body 16 so as to be tiltable forward. Let me do it. In the present embodiment, the lower backrest main body 16 and the upper backrest main body 18 are frames made of a pipe material, but may have any shape as long as they can be stored inside the backrest 14.

As shown in FIGS. 2, 3 and 5, one side of the lower back body 16 in the width direction is provided with a hydraulic cylinder 2
0 is fixed, and the cylinder head 22 of the hydraulic cylinder 20 and the upper backrest body 18 are connected via a connecting body 24. In the present embodiment, the fluid pressure cylinder 20 is divided into upper and lower two chambers, and an opening valve for circulating the fluid in the upper and lower two chambers is provided at a central portion, and this opening valve is opened by a push rod, and the upper and lower two chambers are opened. The cylinder head 22 is raised and lowered by flowing the fluid from the high pressure side to the low pressure side.

In the present embodiment, the connecting body 24 is provided with the upper back support main body 18 forwardly in correspondence with the rise of the cylinder head 22 with the pivot point between the lower back support main body 16 and the upper back support main body 18 as a fulcrum 26. Although it is a substantially V-shaped flat plate for tilting (rotating) to the left (left side in FIGS. 3 and 4), the present invention is not limited to this.

As shown in FIG. 1, the cylinder head 22 of the fluid pressure cylinder 20 is disposed on the other side in the width direction of the lower back body 16 in order to tilt the upper back body 18.
There is provided a balance device 28 that moves up and down in response to the ascending and descending. The balance device 28 has a structure in which oil and high-pressure gas are sealed in a sealed tube cylinder and a load is generated by pushing a piston rod, and is used for opening and closing a rear door of a hatchback type or a wagon type passenger car. The upper backrest main body 18 is tiltably supported together with the fluid pressure cylinder 20 on one side in the width direction of the lower backrest main body 16.

In the drawing, 30 is an armrest, 32 is a switch for operating the hydraulic cylinder 20, and 34 is a push rod in the hydraulic cylinder 20 for pushing down the cylinder head 22 of the hydraulic cylinder 20. Reference numeral 36 denotes a lock pin of the cylinder head 22 of the hydraulic cylinder 20.

The switch 32 and the wire 34 are connected by a mechanical structure so that pressing the switch 32 pulls the wire 34 by several mm.

Therefore, when the upper part of the backrest 14 of the seat of the present embodiment is tilted to the lower front part of the backrest 14, the switch 3
2, the wire 34 is pulled, and the wire 34 pushes down the lock pin 36, which pushes down the push rod, and the push rod opens the release valve. Flows from the high pressure side (upper part) to the low pressure side (lower part), and the cylinder head 22 rises.

At this time, since the fluid pressure cylinder 20 operates according to the time when the switch 32 is pressed, the switch 32
The upper backrest body 18 can be steplessly tilted to the front of the seat in accordance with the pressing time.

When the switch 32 is not depressed, the fluid in the upper and lower two chambers of the fluid pressure cylinder 20 does not flow, and the upper backrest body 18 is supported in that state.

When the upper part of the backrest 14 of the seat of the present embodiment is returned to the original state, the occupant, while holding down the switch 32, applies a load to the upper part of the backrest with his / her weight while sitting down, and the wire 34 is pulled and this wire 3
4 pushes down the lock pin 36, and the lock pin 36 pushes down the push rod, and the push rod opens the release valve, and the fluid in the upper and lower two chambers in the fluid pressure cylinder 20 is changed from the high pressure side (lower) to the low pressure side (upper). And the cylinder head 22 descends.

In this embodiment, the fluid pressure cylinder 20 adjusts the fluid pressure inside the cylinder head 22 to adjust the fluid pressure therein.
It is also possible to use a hydraulic cylinder typified by air pressure, and to freely change the structure inside the hydraulic cylinder 20 to another structure.

Although the present invention relates to a vehicle seat, it is obvious that the present invention can be used for a normal chair.

[0026]

[Effects of the Invention] Since the present invention has the above configuration,
Has the advantage of (1) The vehicle seat of the present invention has a reclining mechanism.
E, the upper part of the backrest can be freely tilted toward the lower front part of the backrest.
In the vehicle seat that is provided in the
The lower back body and the upper back body are divided into two parts.
And a hydraulic cylinder on one side in the width direction of the lower back body.
Is fixed, and the cylinder head of the hydraulic cylinder is
The upper backrest body is connected via a connector, and the lower backrest
Cylinder with the pivot point between the main body and the upper back body as the fulcrum
-The upper back can be tilted freely as the head rises
To perform the tilting operation smoothly.
it can. (2) Shock Absolute for Fluid Pressure Cylinder in Automotive
Occupant sits in the seat vigorously
In the event of an emergency or in the event of an emergency. Furthermore,
It can reduce the impact of the seated person when sitting
In addition, the burden on the seat can be reduced. My sitting
Shock absorption when pressed against a seat
It also has the effect of absorbing shock when hitting the back of the seat.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vehicle seat according to the present invention.

FIG. 2 is an enlarged rear view showing the internal structure of the vehicle seat according to the present invention.

FIG. 3 is an enlarged side view of a main part of the same.

FIG. 4 is an enlarged side view of a main part showing a use state of the same.

FIG. 5 is an enlarged perspective view of a main part of the same.

[Explanation of symbols]

 14 Back

Claims (1)

(57) [Scope of request for utility model registration] A backrest (1) provided with a reclining mechanism;
In a vehicle seat, the upper part of 4) is provided so as to be tiltable toward the lower front part of the backrest (14) , and the backrest (14) has a lower backrest body (16) and an upper part.
The backrest body (18) is provided in two parts, and one side in the width direction of the lower backrest body (16) is provided with a fluid pressure seal.
Cylinder head (22) of the hydraulic cylinder (20) with the cylinder (20) fixed.
And the upper back body (18) are connected via the connecting body (24).
The lower backrest body (16) and the upper backrest body (1
8) The cylinder head is set as a fulcrum (26) with the shaft attachment point with
The upper backrest body (18) is
A vehicle seat characterized in that it is provided to be tiltable.
seat.