JPS6312772Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rotary support structure for a movable armrest in a seat.

[Prior Art] Conventionally, as shown in the tilted side views of FIGS. 6a, b, and c, the armrest main body 1' is disposed on both sides of the seat back A of the seat S in a state in which it protrudes beyond the entire width of the seat back A. has been done. here,
When seat back A is tilted backwards, or when the same seat back A is tilted forward, manually correct the set angle of armrest body 1' with respect to seat back A, and align it in almost the same direction as the seating surface of seat cushion B. However, the rotation operation of the armrest with respect to the seat back A requires two operations: the vertical movement of the armrest body 1' and the operation of the release lever 9, which is not convenient for use as a reclining seat.

Furthermore, the structure of the movable armrest of another seat with an armrest is that it is attached to the side of the seat back A, and when the armrest is stored, it can be lifted above the seat back A, and when in use, it can be folded forward. It's the same.
However, the problem with this conventional product is that the angular position of the armrest is always constant when in use, especially in the case of a seat whose seat back reclines in multiple stages. As explained above, as the reclining seat back tilts, the armrest also moves upward to the front with respect to the seat cushion B, so the angle of the armrest is
For the seated person, the seat is tilted upwards, and the direction of the arms and body position do not match.

[Purpose of the invention] The purpose of this invention was made in view of the problems of the conventional art as described above.In order to eliminate the drawbacks of the conventional art, when the movable armrest starts to rotate, the front end of the movable armrest must be grasped while the front end of the armrest is being grasped. The armrest connecting rod can be released with a single touch by hooking your finger on the built-in operating piece, and the angle of the armrest can be adjusted in multiple stages within a certain practical angle range, making armrest rotation simple and robust. An object of the present invention is to provide a locking/disengaging device having a support structure at low cost.

[Structure of the invention] That is, in the armrest of this invention, which is rotatably supported by a support shaft on the side surface of the seat back of the vehicle seat, a large diameter pivot hole is bored in the inner wall of the rear end of the armrest frame. With,
A disk-shaped washer formed of a plate having a diameter slightly smaller than that of the pivot hole and slightly thicker than the plate thickness of the armrest frame is inserted through the pivot hole, and one side of the washer is provided with a plate that controls the rotation of the armrest frame. A thick disk-shaped ratchet to be adjusted is brought into contact with the armrest frame, and a circular leaf spring for preventing the armrest frame from lateral vibration is brought into contact with the other side on the opposite side, and these ratchets, washers, and circular leaf springs are pivotally supported. The armrest frame is rotatably held within the circular area of the hole by fixing with a caulking pin, etc., and the bolt is inserted into the mounting hole drilled in the center of each of the ratchet, washer, and circular leaf spring. The engaging/disengaging device has a rotary support structure that is inserted through the seat bag and fixed to the side surface of the frame of the seat bag.

Then, the outer periphery of the armrest frame having such a structure is wrapped with a pad, and an armrest cover or the like is attached to complete the desired movable armrest.

[Function] The movable armrests on both sides of the seat back configured as described above can be operated by a person sitting on the seat, holding the knob at the tip of the armrest covered with an armrest cover etc. with one hand and pressing it with the tip of the finger. Then, by pushing the end knob of the armrest in the direction in which the locking claw E of the pole and the locking claw F of the ratchet are released from each other, that is, pushing the knob at the end of the armrest backward, the armrest body can be moved upward or downward while grasping these ends. It can be rotated in any direction.

After that, when you let go of your hand at a predetermined arm angle, the pole fitted into the support pin will swing freely due to the elastic force of the elastic body such as the interposed coil spring of the connecting rod. As a result, the pawl E on the pole and the pawl F on the ratchet move in the opposite direction.
The adjustment angle can be adjusted in 5 degree increments.
It has a built-in rotating support structure that engages and stops at a desired angle.

[Example] Hereinafter, an example of this invention will be described with reference to the drawings. Regarding the embodiment shown in FIGS. 1 to 3, FIG. 1 is an overall perspective view of a seat S having armrest bodies 1 and 1 of this invention. This seat S has a seat back A that can be raised and lowered freely with respect to the seat cushion B, and the armrest bodies 1, 1 are attached to the seat back A on both sides of the seat back A.
It is arranged so that it protrudes beyond the full width of the The exploded perspective view of FIG. 2 showing the pivoting portion of the left armrest of the seat S clearly shows the main components of the locking device for the movable armrest. Furthermore, FIG. 3 is an explanatory view showing the engaged state of the lock device.

First, both armrests of the seat S are symmetrical, and the components of the locking device of the left armrest will be explained with reference to the exploded perspective view of FIG.

D is a seat bag frame that supports the seat bag A, and this figure shows the main part of one corner. Hollow side plates 35 are fixed at predetermined height positions on both outer sides of the seat back frame D. A short support shaft 3 is implanted in the perforation 36 on the outside of the side plate 35 so as to extend horizontally outward.
A bearing board 3 is attached to the tip of the support shaft 3.
1 and a female screw 32 are provided, and the tip of this support shaft 3 is made to protrude and extend from the outer surface of the seat bag A.

Reference numeral 11 denotes an armrest frame made of a thin steel plate having a tapered C-shaped cross section.A large diameter pivot hole 12 is bored in the rear side of the armrest frame 11, which serves as a structural base material. be. A smooth circumferential surface is provided around the pivot hole 12. A washer 13 sized to loosely fit into this pivot hole 12 is interposed. On the other hand, at the front, the tapered front end 14 of the arm is provided with a small-diameter through hole 15 that is slidable in the longitudinal direction. Furthermore, a bifurcated locking piece 16 is cut and raised on the side surface of the armrest frame 11 at right angles to the surface. Furthermore, between this locking piece 16 and the pivot hole 12,
A pole 2, which has an overall pentagonal shape and has a locking pawl E toward the pivot hole 12 on one side, is pivotally attached to the support hole 17 bored in the armrest frame 11 with a flanged support shaft 24. On the same line as the hole center of the pivot hole 12 of the armrest frame 11 shown in FIG. The face was drilled,
A rotation limiting piece of the ratchet 4, which will be described later, moves in and out.

Reference numeral 5 designates a circular leaf spring disposed on one side of the washer 13 of the pivot hole 12, which has a through hole 51 in the center and two fastening holes 52, 52, and has a circular leaf spring extending in the direction of three equal parts of the outer circumference. A semicircular-arc-shaped ear portion is integrally protruded, and a plate-shaped protrusion is carved in the center of each of the protruding pieces 53, 53, . . . .

As shown in FIG. 2, the washer 13 has a through hole 31' in the center and two notches.
The thickness of the armrest frame 1 is selected from a material that is slightly thicker than that of the armrest frame 1.

Reference numeral 4 denotes a ratchet, and the ratchet 4 is approximately within a quarter of the outer circumference that engages with the locking pawl E of the pawl 2.
A locking pawl F is carved over a predetermined section of 70 degrees, and a rotation limiter 43 is protruded from one end of the locking pawl F at a position approximately 50 degrees, and a rotation limiter 43 is provided at a position approximately 50 degrees from one end of the locking pawl F. from,
A rotation limiter 44 is also protruded at a position of approximately 218 degrees, and a through hole 41 is bored at the center of rotation, and two fastening holes 42, 42 are further bored therein. It has been done. One side of the ratchet 4 is attached to the outside of the washer 13 that is slightly protruding from the pivot hole 12 of the armrest frame 11, and the leaf spring 5 is attached to the washer 13.
On the opposite side of 3, the protruding pieces 53, 53, which have a semicircular arc shape from the outer circumferential circle, are arranged so that each vertex of the dish-shaped protrusion comes into contact with one side of the armrest frame 11, and then the above-mentioned Align the fastening holes 42, 42, the fastening holes 52, 52 of the leaf spring 5, and the notches of the intermediate washer 13, and use the caulking pins 6, 6 to
As shown in the figure, it is fixed like a sandwich.

Further, a tightening bolt 7 of a predetermined diameter is inserted into the ratchet 4, the washer 13, the through hole 41 and the through hole 31' in the center of the leaf spring 5, and the through hole 51, and then into the female thread 32 of the base plate 31. It is fastened.
The pivot hole 12 of this armrest frame 11 is used as a supporting point, and this armrest main body 1
is configured to be rotatable in the vertical direction. As a result of this tightening, the support shaft 3 and the ratchet 4 are tightened, and the pole 2 on the armrest frame 11 side is tightened.
The combination of this and the ratchet 4 in the normal seating state is as shown in FIG. Therefore, the angle occupied by the total width of the locking claw E of the pole 2 is approximately 15
Although the number of teeth is 3, the permissible vertical rotation range of the armrest body 1 is as follows:
The minimum adjustment angle is approximately 5 degrees due to the engagement strength of the locking pawls E and F and the strength of the fastening bolt 7 in this embodiment.

On the other hand, a locking hole 21 is bored in the free end of the pole 2 that engages and disengages with the ratchet 4, and a connecting rod 8 extends between the locking hole 21 and the through hole 15 of the arm front end 14. But it is prepared here. As shown in FIG. 2, the connecting rod 8 is a round bar whose rear end 81 is bent into a hook shape, and is inserted into the locking hole 21 from the front side. The front end 82 is inserted into the through hole 15 and has a length that projects slightly forward.The front end 82 is also exposed to the front end of the armrest main body 1, and is fixed to the knob 80 that is screwed from the outside. I can wear it. In addition, a processed protrusion 83 is provided in the middle of the connecting rod 8, and is incorporated so as to be inserted through the bifurcated middle of the cut and raised locking piece 16 of the armrest frame 11. Then, it comes into contact with the surface of the locking piece 16, and between it and the above-mentioned processed protrusion piece 83,
A coiled spring ₉₀ wound around the connecting rod 8 is interposed to constantly bias the free end of the pole 2 in the direction of pulling it forward. As a result, the knob 80 at the center of the front end of the armrest main body 1 stops slightly protruding from the skin material of the armrest, and by pressing the knob 80 backward, the coil spring ₉₀ is pressed, and the pole 2 The free end of the latch moves toward the pivot hole 12, and the locking pawl E on the opposite side of the support shaft 24 separates from the locking pawl F of the ratchet 4 described above. In this state,
While grasping the front end of the armrest main body 1, the armrest can be rotated in any direction, such as upward or downward. After that, when you let go of your hand, the pole 2 fitted into the support shaft 24 is made to swing freely due to the elastic force of the interposed coil spring ₉₀ of the connecting rod 8. Therefore, one of the locking pawls E moves in the opposite direction to the connecting rod 8, and the locking pawl E and the locking pawl F of the ratchet 4 engage with each other at a desired angle and stop.

[Effect of the idea] Next, the effects of this invention will be listed.

(1) Since the armrest frame is rotatably attached using the ratchet, washer, and circular leaf spring, the rotation support part of the armrest of this invention can be configured in advance, and as a result, this armrest can be attached to the bolt 1. It can be fixed to the side of the seatback frame with a book, making it easy to assemble.

(2) In addition, a large diameter pivot hole is drilled in the inner wall of the rear end of the armrest frame, and a washer with an outer diameter slightly smaller than the inner diameter of this pivot hole is used as the supporting surface, so the surface pressure on this surface is is small, durability can be ensured, and the armrest frame itself can be pivoted without providing a separate bearing to the armrest frame, so the structure can be easily constructed.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of this invention. Figure 1 is an overall perspective view of a seat explaining an embodiment of this invention, and Figure 2 shows a rotational support structure of an armrest of this invention. FIG. 3 is an explanatory diagram showing the engaged state of the rotary support structure, FIG. 4 is a cross-sectional view taken along the arrow line in FIG. 3, and FIG.
The figure is a diagram of an engaged state of the main components of the rotation support structure, and FIGS. 6a, b, and c are side views of a conventional seat with an armrest. A... Seat back, B... Seat cushion, D... Seat back frame, E, F... Locking claw, S... Seat, 1, 1'... Armrest body, 2... Pole, 3... Support shaft, 4...Ratchet, 5...Circular leaf spring, 7...Tightening bolt,
8... Connecting rod, 9 ₀ ... Coil spring, 11... Armrest frame, 12... Pivot hole, 13...
Washer, 15... Through hole, 16... Locking piece, 17...
...Bearing hole, 41...Through hole, 43, 44...Rotation restriction, 80...Knob.

Claims (1)

[Scope of utility model registration request] In an armrest that is rotatably supported by a support shaft on the side of the seat back of a vehicle seat, a large-diameter pivot hole is bored in the inner wall of the rear end of the armrest frame, and a pivot hole with a slightly smaller diameter than the pivot hole is bored in the inner wall of the rear end of the armrest frame. , and a disk-shaped washer made of a plate slightly thicker than the armrest frame is inserted through the pivot hole, and a thick disk-shaped ratchet is provided on one side of the washer for adjusting rotation of the armrest frame. and a circular leaf spring for preventing the armrest frame from lateral vibration is brought into contact with the other side on the opposite side, and these ratchets, washers, and circular leaf springs are connected within the circular range of the pivot hole. The armrest frame is rotatably held by fixing with caulking pins, etc., and bolts are inserted into mounting holes drilled in the centers of the ratchet, washer, and circular leaf spring to attach the frame to the side of the seat back. A rotating support structure for an armrest, characterized by being fixed to.