JPH057964Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an armrest device for a seat of a vehicle, civil engineering work machine, etc.

[Prior Art] A conventional armrest device for this type of seat has a seat back 31 as shown in FIGS. 5 and 6.
A shaft 36 and a stopper pin 33 are protruded from a metal fitting 35 attached to the side surface of the armrest 32, and a stopper plate 37 is attached to the armrest 32, which has a hole in the center and a notch 38 on the periphery. The armrest 32 is attached to the seat bag 31 in a substantially horizontal manner by fitting the shaft 36 of the seat bag 31 into the hole in the plate 37 and by abutting the stopper pin 33 at the lower end of the notch 38.

[Problem to be solved by the invention] However, in the above device, the seat back 31
Since the setting angle α between the armrest 32 and the armrest 32 is always constant, if the angle of the seatback 31 changes, the upper surface of the armrest 32 and the seat surface 34 will not become parallel as shown in FIG. The downside was that it was bad.

Furthermore, in order to solve this problem, it may be possible to separate the armrest and the seat back and provide them separately, but this poses problems in terms of installation space and high cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a seat armrest device that can be adjusted so that the upper surface of the armrest remains parallel to the seat surface even if the angle of the seat back changes.

[Means for Solving the Problems] In order to achieve the above object, the seat armrest device of the present invention includes a shaft and a stopper pin protruding from the side surface of the seat back, and a notch in which the stopper pin is located is formed on the periphery. a stopper plate in which a pin having a threaded portion is implanted and rotatably supported on the shaft; an arcuate projection; and an arcuate guide hole through which the pin of the stopper plate passes. an armrest frame rotatably pivoted to the shaft; an adjuster having an eccentric disk on one side whose outer periphery slides on the arc-shaped projection and rotatably attached to the pin of the stopper plate; and a grip that tightenably screws the adjuster into a threaded portion of a pin implanted in the stopper plate, and by rotating the adjuster, the grip is attached to the arcuate protrusion on the outer periphery of the eccentric disk. It is characterized in that the contact position changes and the set position of the armrest can be adjusted.

[Operation] Rotating the grip to loosen the tightening and rotating the adjuster changes the contact surface between the outer periphery of the eccentric plate and the arc-shaped protrusion, so the armrest can be rotated upwards or at a predetermined angle around the axis. do. Therefore, all you have to do is adjust the upper surface of the armrest to a position where it is parallel to the seat surface and tighten the grip. Therefore, even if the angle of the seat back changes, the parallel state between the armrest and the seat surface can always be maintained.

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

Seat back 1 as shown in Figures 1 to 3.
A metal fitting 14 from which a shaft 15 and a stopper pin 3 are protruded is attached to the side surface. On the other hand, an armrest frame 6 having an arcuate projection 7 and a guide hole 16 is integrally attached to the lower part of the armrest 2. Further, numeral 5 is an adjuster having an eccentric disk 17 attached to one side that contacts the protrusion 7, and 8 is a stopper plate having a notch 18 formed in its upper periphery and a pin 9 having a threaded portion implanted in its lower part. , 10 is a grip having a threaded hole (not shown) that engages with the threaded portion of the pin 9.

Then, a stopper plate 8 and an armrest frame 6 are attached to the shaft 15 of the metal fitting 14 of the seat back 1.
is rotatably attached via a bush 11, a washer 12, and a screw bolt 13. At this time, the pin 9 of the stopper plate 8 passes through the guide hole 16 of the armrest frame 6, and the adjuster 5 is rotatably attached thereto, and a grip 10 is screwed onto the tip to tighten the adjuster 5.

Next, the operation of the above device will be explained. The armrest 2 is attached to the stopper pin 3 of the metal fitting 14 as shown in FIG.
is rotatable in the range where it contacts both ends of the notch 18 of the stopper plate 8 (the lifting range A). Further, the armrest 2 can be adjusted within a predetermined angle B from its lower limit set position by rotating the adjuster 5. That is, by rotating the grip 10 to loosen the tightening and rotating the adjuster 5, the eccentric disc 17
rotates about the pin 9 as an eccentric axis, and the distance between the contact surfaces of the eccentric disc 17 and the arcuate protrusion 7 changes, so the armrest 2 rotates upward or downward about the axis 15. Therefore, the upper surface of the armrest 2 may be adjusted to a position where it is parallel to the seat surface 4, and the grip 10 may be tightened. Therefore, even if the angle of the seat back 1 changes as shown in FIG. 4, the angle between the seat back 1 and the armrest 2 can be changed to c,
Since it can be adjusted as shown in a and b, it is possible to always maintain a parallel state between the armrest 2 and the seat surface 4.

[Effects of the invention] As explained above, according to the invention, even if the angle of the seat back is changed, the armrest and the seat surface can always be adjusted to be parallel to each other.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Fig. 2 is an explanatory diagram showing the assembled state, Fig. 3 is a side view of main parts in the assembled state, Fig. 4 is a simplified side view illustrating the operating state, and Fig. 5 is an exploded perspective view showing the conventional example. , FIG. 6 is a simplified side view illustrating its operation. 1... Seat back, 2... Armrest, 3
... Stop pin, 4 ... Seat surface, 5 ... Adjuster star, 6 ... Armrest frame, 7 ... Protrusion,
8... Stopper plate, 9... Pin, 10...
Grip, 15... Axis, 16... Guide hole, 17
...Eccentric disc, 18...notch.

Claims (1)

[Claims for Utility Model Registration] A shaft and a stopper pin protruding from the side surface of the seat bag, a notch in which the stopper pin is located is formed on the periphery, and a pin having a threaded portion is embedded, and the shaft is rotatably mounted. a pivotally supported stopper plate; an armrest frame having an arcuate protrusion and an arcuate guide hole through which a pin of the stopper plate passes, and rotatably attached to the shaft; an adjuster having on one side an eccentric disk whose outer periphery slides on an arc-shaped protrusion and rotatably attached to a pin of the stopper plate; and an adjuster attached to a threaded portion of the pin implanted in the stopper plate. and a grip that is tightenably screwed together, and by rotating the adjuster, the contact position of the outer periphery of the eccentric disk with the arcuate protrusion changes, thereby making it possible to adjust the set position of the armrest. Seat amrest device featuring: