JPS6322915Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an armrest adjustment device for a reclining seat.

Even if an armrest is attached to an appropriate position on the side of the seatback of a reclining seat designed to allow the seatback to be tilted backwards, when the seatback is tilted backwards, the tip of the armrest will be directed upwards. There is a problem that it becomes difficult to use.

Therefore, the present invention was devised to solve the above-mentioned problems, and provides an armrest adjustment device for a reclining seat that can always keep the armrest approximately horizontal regardless of the inclination angle of the seat back and improve usability. The purpose is to

Therefore, in the present invention, the armrest adjustment device is provided with a guide rail on the side surface of the leg of the seat cushion, which has a shape that is approximately the same as the movement trajectory of the support shaft of the armrest when the seatback is tilted, and whose rear part descends in an arc shape. The other end of the armrest is slidably engaged with the guide rail, and a locking hole is bored at an appropriate position on the side surface of the leg near the guide rail. A removable lock lever is rotatably connected to the locking hole via a pivot pin, and the lock lever is connected to the lock lever such that the lock lever is always biased in a direction to engage with the locking hole. This structure is such that a biasing member is interposed between the armrest and the armrest to achieve the intended purpose.

The present invention will be described below with reference to illustrative embodiments.

21 is a seat cushion of a reclining seat, and leg portions 1 are provided on both sides of the lower surface of the seat cushion 21. Reference numeral 4 denotes a seat back of the reclining seat, which is pivotally attached to the upper end of the leg 1 on the rear side of the seat cushion 21 via a reclining adjuster 20 so as to be tiltable rearward.

Seat back frame 1 of the seat back 4
A support shaft 16 is rotatably attached to the side of the support shaft 4 through a bearing 15, and a bracket 17 is formed at the outer end of the support shaft 16. One end of the is attached. A bearing piece 19 is fixed to the inner end of the support shaft 16 to prevent the support shaft 16 from coming off. As a result, one end of the armrest 5 is pivotably attached to both sides of the seat back 4.

A guide rail 3 is formed on the side surface of the leg portion 1. The guide rail 3 has substantially the same shape as the locus of movement of the support shaft 16 of the armrest 5 when the seat bag 4 is tilted, that is, the rear portion thereof descends in an arc shape. A resin member 10 is fitted to the periphery of the guide rail 3, and the resin member 1 is fitted to the guide rail 3.
A guide member 11 is provided which is slidably fitted to the upper and lower edges of the guide rail 3 and slides within the guide rail 3. The other end of the armrest 5 is rotatably attached to the guide member 11 by a bolt 12 and a nut 13.

A lock lever 6 is pivotally attached to the vicinity of the other end of the armrest 5 via a pivot pin 7 so as to be rotatable in the left-right direction. ′ is formed,
The locking portion 6' is configured to be removable from a plurality of locking holes 8 formed in the leg portion 1. A spring 9, which is a biasing member, is wound around the pivot pin 7, and one end of the spring 9 is latched to the armrest 5.
The other end is locked to the lock lever 6, so that the lock lever 6 is always biased in the direction of engagement with the locking hole 8.

With the above configuration, when the lock lever 6 is operated to release the lock and the seat back 4 is tilted rearward, the support shaft 16 to which the armrest 5 is pivoted rotates around the lower pivot point P of the seat back 4, and at the same time , the guide member 11 of the armrest 5 is guided by the guide rail 3 and slides rearward.

The inclination of the armrest 5 is determined by the position of the support shaft 16 and the position of the guide member 11. Therefore, the inclination of the armrest 5 is the same as that of the seat back 4.
The shape of the guide rail should be set so that it is approximately horizontal even when the is tilted backward. The same applies to the case where the seat back 4 is tilted forward. For this reason, in the embodiment, the shape of the guide rail 3 is made to be substantially the same as the locus of movement of the support shaft 16 of the armrest 5 when the seat bag 4 is tilted.

When the seat back 4 is tilted at a predetermined angle,
The locking portion 6' of the lock lever 6 is engaged with the locking hole 8 by the spring force of the spring 9, and the seat bag 4 is locked in its tilted state and maintained in this state.

As described above, according to the present invention, a guide is provided on the side surface of the leg of the seat cushion, which has a shape substantially the same as the locus of movement of the support shaft of the armrest when the seat bag is tilted, and whose rear part descends in an arc shape. a rail is formed, the other end of the armrest is slidably engaged with the guide rail, and a locking hole is bored at an appropriate position on the guide rail or on the side surface of the leg near the guide rail; A lock lever that is removable from the locking hole is rotatably attached to the other end of the armrest via a pivot pin, and the lock lever is always biased in a direction to engage with the locking hole. In addition, since a biasing member is interposed between the lock lever and the armrest, the armrest is lowered or raised depending on the inclination angle of the seat back by the guide rail whose rear part descends in an arc shape, so that the seat back can be returned to the normal state. Even if the armrest is tilted backwards or forwards, the armrest always maintains a substantially horizontal state and can comfortably support the arms of the person sitting on the seat. Improved usability.

Further, according to the present invention, since the lock lever is provided at the other end of the armrest, the reclining operation mechanism can be simplified.

[Brief explanation of the drawing]

1A, B, and C are side views showing the tilted state of the seat back and the positional relationship of the armrest of a reclining seat equipped with an armrest adjustment device according to the present invention; FIG. 2 is an enlarged perspective view showing the armrest adjustment device; and FIG. The figure is an exploded enlarged perspective view showing how the armrest is attached to the seat back, and FIG. 4 is an enlarged sectional view showing the relationship between the guide member and the guide rail. 1 is a leg, 3 is a guide rail, 4 is a seat back, 5 is an armrest, 6 is a lock lever, 8 is a locking hole, 11 is a guide member, 16 is a support shaft, and 21 is a seat cushion.

Claims (1)

[Scope of utility model registration request] A seat bag is tiltably pivoted to the rear of a seat cushion that has legs on the lower side, one end of an armrest is rotatably pivoted via a spindle to the side of the seat bag, and the side of the leg A guide rail is formed which has a shape substantially the same as the movement locus of the support shaft of the armrest when the seatback is tilted, and whose rear part descends in an arc shape, and the other end of the armrest can slide on the guide rail. engaged, and a locking hole is bored at an appropriate position on the side surface of the leg near the guide rail, and
A lock lever that is removable from the locking hole is rotatably attached to the other end of the armrest via a pivot pin, and further, the lock lever is always biased in a direction to engage with the locking hole. An armrest adjustment device for a reclining seat, characterized in that a biasing member is interposed between the lock lever and the armrest so that the armrest adjusts.