JPH0537560U - Vehicle seat - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the load on the shoulder blades of the seated person,
Moreover, the upper part of the backrest can be tilted to the lower front part of the backrest according to the preference of the seated person. [Structure] In a seat with a reclining mechanism, the upper part of the backrest is tiltably provided toward the lower front part of the backrest, and the upper part of the backrest is reliably secured from the shoulder scapula of the seated person to the upper part (neck, head). What can be abutted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle seat that can reduce fatigue when sitting.

[0002]

[Prior Art]

 Conventionally, as a seat of a vehicle such as a passenger car or a sightseeing bus, one having a built-in reclining mechanism for tilting the entire backrest to the rear of the seat is known. I sat down with the backrest tilted to the rear of the seat, depending on my preference.

[0003]

[Problems to be solved by the device]

 Since the conventional procedure is as described above, the backrest is tilted to the rear of the seat as a whole, so when seated, ensure that the upper part (neck, head) of the seated person's shoulder scapula rests against the backrest. Since there is no contact, the load of the seated person is easily applied to the scapulae of the seated person, and the seated person becomes fatigued.

In order to protect the scapulae of the seated person, some seats have a shape in which the upper part of the backrest is inclined to the front lower part of the backrest, but even in this seat, the backrest is entirely behind the seat. The load on the scapulae of the occupant is somewhat reduced because it is tilted, but it is not very effective and the inclination of the upper back from the scapulae cannot be adjusted according to the preference of the occupant. That was a problem.

In view of such drawbacks, the present invention reduces the load applied to the scapulae 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. The purpose of the present invention is to provide a vehicle seat that can be used.

[0006]

According to the present invention, in a seat having a reclining mechanism, an upper part of a backrest is tiltably provided toward a lower front part of the backrest.

[0007]

[Action]

 The operation of the present invention will be described.

When seated in the vehicle seat according to the present invention, the entire backrest is tilted rearward of the seat according to the preference of the seated person.

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.

Further, when returning the upper part of the backrest to its original state, if the seated person applies a load to the upper part of the backrest by its own weight in the seated state, the upper part of the backrest returns to the original state.

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

[0012]

【Example】

 An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a vehicle seat according to the present invention is a seat in which a backrest 14 is reclinably provided with respect to a seat portion 12, and an upper portion of the backrest 14 is a lower front portion of the backrest 14. It is provided so that it can be tilted toward, and its configuration will be described in detail below.

As shown in FIGS. 1 to 5, the backrest 14 includes a lower backrest main body 16 and an upper backrest main body 18 which are divided into upper and lower parts from a contact position of a scapula of a seated person. The backrest main bodies 16 and 18 are covered with a cushioning material and the like, and the outer sides thereof are covered with a cover or the like. The upper backrest main body 18 is tilted forward toward the upper part of the lower backrest main body 16. Is pivoted. In the present embodiment, the lower backrest main body 16 and the upper backrest main body 18 are frame bodies made of pipe material, but may have any shape that can be housed inside the backrest 14.

As shown in FIGS. 2, 3 and 5, the base of the fluid pressure cylinder 20 is fixed to one side of the lower backrest main body 16 in the width direction, and the cylinder head 22 of the fluid pressure cylinder 20 and the cylinder head 22 are fixed. The upper backrest main body 18 is connected via a connecting body 24. In this embodiment, the fluid pressure cylinder 20 is divided into two chambers, an upper chamber and a lower chamber, and an opening valve for circulating the fluid in the upper and lower chambers is provided in the central portion. The cylinder head 22 is moved up and down by flowing the fluid in the chamber from the high pressure side to the low pressure side.

Further, in the present embodiment, the connecting body 24 uses the shaft attachment points of the lower backrest body 16 and the upper backrest body 18 as fulcrums 26 to correspond to the ascent of the cylinder head 22 and to move the upper backrest body 18 to the front. It is a substantially V-shaped flat plate for tilting (rotating) to the left (in FIGS. 3 and 4), but is not limited to this.

As shown in FIG. 1, since the upper backrest body 18 is tilted to the other side in the width direction of the lower backrest body 16, the upper backrest body 18 is raised and lowered in correspondence with the elevation of the cylinder head 22 of the fluid pressure cylinder 20. A balancing device 28 is provided. This balancing device 28 has a structure in which oil and high-pressure gas are enclosed in a closed tube cylinder and a load is generated by pushing the piston rod. The upper backrest main body 18 is tiltably supported together with the fluid pressure cylinder 20 on one side of the lower backrest main body 16 in the width direction.

In the figure, 30 is an armrest, 32 is a switch for operating the fluid pressure cylinder 20, 34 is a push rod in the fluid pressure cylinder 20 for raising the cylinder head 22 of the fluid pressure cylinder 20. The wire for pressing down and opening the open valve, 36 shows the lock pin of the cylinder head 22 of the fluid pressure cylinder 20.

Further, the switch 32 and the wire 34 are connected by a mechanical structure so that the wire 34 is pulled by several mm when the switch 32 is pushed.

Therefore, when the upper part of the backrest 14 of the seat of this embodiment is tilted to the lower front part of the backrest 14, the wire 34 is pulled by pushing the switch 32, and the wire 34 is pulled by the lock pin 36. The lock pin 36 pushes down the push rod, the push rod opens the open valve, and the fluid in the upper and lower chambers in the fluid pressure cylinder 20 flows from the high pressure side (upper side) to the low pressure side (lower side). The head 22 rises.

At this time, since the fluid pressure cylinder 20 operates corresponding to the time when the switch 32 is pressed, the upper backrest main body 18 can be tilted forward in front of the seat in correspondence with the time when the switch 32 is pressed. it can.

Further, when the switch 32 is not pushed, the fluid in the upper and lower chambers in the fluid pressure cylinder 20 does not flow, so that the upper backrest main body 18 is supported in that state.

Further, when the upper part of the backrest 14 of the seat of this embodiment is returned to its original state, the switch 32 is pressed and the occupant applies a load to the upper part of the backrest by the weight of the seated person while sitting. The wire 34 is pulled, the wire 34 pushes down the lock pin 36, the lock pin 36 pushes down the push rod, the push rod opens the open valve, and the fluid in the upper and lower two chambers in the fluid pressure cylinder 20 becomes high pressure. From the side (bottom) to the low pressure side (top), the cylinder head 22 descends.

Further, in the present embodiment, the fluid pressure cylinder 20 adjusts the fluid pressure inside to raise and lower the cylinder head 22, and may be hydraulic pressure, or a cylinder represented by fluid such as air pressure may be used. It is free to do so, and it is free to make the structure in the hydraulic cylinder 20 into another structure.

Further, although the present invention relates to a vehicle seat, it is obvious that the present invention can be applied to an ordinary chair.

[0026]

[Effect of the device]

 According to the vehicle seat of the present invention, in the seat having the reclining mechanism, the upper part of the backrest is provided so as to be tiltable toward the lower front part of the backrest. , The head) can be tilted forward from the lower part of the scapula of the seated person, and the upper part of the backrest can be reliably brought into contact with the upper part of the seated part of the seated person. The load on the part can be reduced and the upper part of the backrest can be tilted according to the preference of the seated person.

[Brief description of 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 the same.

FIG. 4 is an enlarged side view of an essential part showing the usage state of the same.

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

[Explanation of symbols]

 14 back

Claims (1)

[Scope of utility model registration request] 1. A vehicle seat having a reclining mechanism, wherein an upper portion of a backrest (14) is tiltably provided toward a lower front portion of the backrest (14).