JPH0246758Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an angle adjustment device that allows the armrest of a seat for a vehicle such as an automobile to be freely rotated by operating a knob.

[Prior Art] Conventionally, disposing and attaching a movable armrest to a seat for a vehicle such as an automobile is highly effective in maintaining a comfortable seating posture. Therefore, as shown in the tilted side views of the seat with a flip-up armrest shown in FIGS. 7 and 8, the seat cushion A of the seat S and the side of one seat back B are The armrest main body 1' is arranged so as to protrude beyond the entire width of the seat back B, so that it can be placed side by side on both sides of the seat back B. Such armrests are already known and are in practical use.

In order for the occupant to take a safer posture, and due to differences in occupant preference, such a conventional armrest main body 1' is designed to be restrained with the front slightly upwards rather than horizontally, regardless of the inclination of the seat back B. It is appropriate that the armrest has a suitable slope.

However, by tilting the seat back B backward,
Vehicle seat S with so-called reclining adjustment
Even when the above-mentioned flip-up armrest main body 1' is assembled, if the seat back B is tilted backwards or the same seat back B is tilted forward, Due to the above-mentioned flip-up type, the armrest main body 1' cannot perform a sufficient angle adjustment function. The reason for this is that the set angle of the armrest main body 1' with respect to the seat back B is manually corrected so that it is aligned in almost the same direction as the seating surface of the seat cushion A. The vertical movement release lever 9' of the main body 1' had to be operated twice, and as described above, it was not convenient to use as a reclining seat.

In addition, in the case of a vehicle seat S in which the seat back B reclines in multiple stages in one direction, as the reclining seat back B tilts back and forth, the armrest body 1' also moves against the seat cushion A. Since the seat moves forward and upward, at this time, the restraining angle of the armrest becomes too forward and upward for the seated person, making the direction of the arms and body position inappropriate.

As a countermeasure against such a problem, there is a method of adjusting the angle of the armrest main body 1' downward when the seat back B is tilted, and many ideas have been made for such a new arm angle adjustment mechanism.

[Purpose of invention]

This invention relates to the above-mentioned adjustable armrest angle adjustment device, and in view of the above-mentioned conventional problems, it was devised to eliminate the conventional drawbacks, and the purpose of this invention is to When the movable armrest starts to rotate, while grasping the front end of the movable armrest, you can operate the knob by hooking your finger on the terminal of the knob built into the front of the front end, and the armrest connecting rod can be released with a single touch. , can be released with minimal operating force, and
The angle of the armrest can be adjusted within the desired operating range, at least within the practical angle range by adding a ratchet with a stopper piece even only in the downward direction, making it adjustable in multiple stages, as well as adjusting its rotation. To provide an armrest angle adjusting device having a simple and robust armrest support structure in which the device and the supporting device itself are simple and robust.

By changing the armrest to the above-mentioned armrest with a multi-stage angle adjustment mechanism, the usability is significantly improved.

[Structure of the idea]

That is, in the armrest rotatably supported on the side surface of the seat back of the vehicle seat of this invention, a pivot hole is bored in the inner wall at the rear end of the armrest frame, and an interposition hole is provided that is smaller in diameter than the pivot hole. A disc is inserted through the pivot hole, and a ratchet for adjusting the rotation of the frame is brought into contact with one side of the interposed disc, and a circular plate spring is brought into contact with the other side, so that the ratchet and the interposed disc are brought into contact with each other. By tightening the bolts and the circular plate spring within the operating range around the pivot hole, the frame is rotatably held, and the frame can be engaged with and disengaged from the locking pawl around the ratchet in the middle, and the other The tip transmits the rotational motion of one end of the built-in eccentric cam so as to transmit the motion of the operating knobs pivoted in parallel, and the other end that contacts the eccentric cam transmits the rotational motion to the locking pawl E. The armrest angle adjusting device is configured such that a pole with a cam surface is engaged with the armrest. Then, the outer periphery of the frame having such a structure is wrapped with a pad, and an armrest cover or the like is covered to complete an armrest adjustable angle adjustment device.

[Effect]

In the movable armrest angle adjustment device of the seat back B configured as described above, (1) In order to lower the armrest 1 from its stowed state to the set position, a person sitting on the seat S cannot be exposed from the tip of the armrest cover. While grasping the tip of the knob 7 of the armrest 1 attached to the armrest 1 with one hand, press the knob 7 with your fingertip. It slides on the circumferential surface, and at the set position, the locking pawl E of the pole 2 and the locking pawl F of the ratchet 4 engage with each other due to the elastic force of the elastic body such as the coil spring 9 and the locking pawl F of the ratchet 4, and the armrest is closed. 1 is directed downward and locked.

(2) Next, if you want to adjust the angle of the armrest 1 downward, just pull the knob 7 at the tip of the armrest 1 upward. That is, if the knob 7 is pulled upward while grasping the tip of the armrest 1, the operating force is amplified by the force transmission to the eccentric cam, and the pole 2
The locking claw E of the armrest 4 and the locking claw F of the ratchet 4 are disengaged from each other, and as a result, the armrest 1 can be rotated downward in multiple stages.

(3) Conversely, if you wish to adjust the angle of the armrest 1 downward, simply raise the tip of the knob 7 of the armrest 1 forward and upward. That is, the armrest main body 1 can be lifted upward as it is.

After that, when you release your grip at a predetermined arm angle, the pole 2 fitted into the support shaft 24 slides in one direction due to the elastic force of the elastic body such as the coil spring 9 of the connecting rod. Due to the freely configured structure, the armrest moves internally in opposite directions, and the locking claw E of the pawl 2 and the locking claw F of the ratchet 4 engage and stop at the desired angle of the armrest 1, allowing the armrest angle to be adjusted. It functions as a device.

〔Example〕

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings. 1 is a front view of the armrest angle adjusting device of this invention in an engaged state, FIG. 2 is a plan view thereof, and FIG. 3 is a sectional view taken along the line A--A in FIG. 1. FIG. 6 is an overall perspective view of a vehicle seat S having an armrest body of this invention.

This vehicle seat S has a seat back B that can be raised and lowered with respect to a seat cushion A, and an armrest main body 1 is disposed on both sides of the seat back B so as to protrude from the entire width of the seat back B. . In the exploded perspective view of FIG. 4, which shows the pivot portion of the left armrest main body 1 of the seat S, the main components of the angle adjustment device of the armrest main body 1 are clearly shown.

Hereinafter, both armrest bodies 1 of the seat S are symmetrical, and the components of the angle adjustment device of the left armrest body 1 will be explained with reference to the exploded perspective views of FIGS. 4 and 5.

First, D is a seat bag frame that supports the seat bag B, and this figure shows the main part of the even angle on one side. Hollow side plates 37 are fixed at predetermined height positions on both outer sides of the seat back frame D. In the perforation 36 on the outside of this side plate 37,
A short support shaft 3 is installed horizontally outward. A bearing base plate 31 and a female thread 32 are provided at the distal end of the support shaft 3, and the distal end of the support shaft 3 extends to protrude from the outer surface of the seat bag B. Reference numeral 11 is an armrest frame (hereinafter simply referred to as frame) which is made by bending a thin steel plate into a C-shape to form a formed cross section, and is formed to have a tapered rectangular shape. As a result of the tightening of this frame 1, the support shaft 3
The side plate 31 and the ratchet 4 are tightened,
The combination of an eccentric pole 2 and a ratchet 4 on the side of the frame 11, which will be described later, in a normal seating state is arranged as shown in FIG.

A reinforcing plate 10 having an overall rectangular shape is disposed on the rear side surface of the frame 11. A large-diameter pivot hole 12 and a support hole 1 are provided on the rear side of the frame 11 and on the arbitrary oval-shaped reinforcing plate 10.
7 and a support hole 27 are drilled on the center line of the frame 11. Further, a smooth circumferential surface is provided around the pivot hole 12 of the reinforcing plate 10 described above. An intervening disk 13 having a size that fits loosely into the pivot hole 12 is interposed therein.

On the other hand, at the front end of the tapered frame 11, a small diameter through hole 15 is bored in the upper part of the arm front end 14 in the thickness direction. This through hole 15
It is pivoted so that it can swing. Also, frame 11
There is a pivot hole 1 on one side of the reinforcing plate 10 in the middle of the side surface.
An eccentric pole 2 having a hook-like shape as a whole with a locking claw E facing toward the 2 side is attached to a support hole 1 bored in this frame 11.
7', a flanged support shaft 24 is also pivotally connected to the shaft 7'. Furthermore, on the same line as the hole center of the pivot hole 12 of the reinforcing plate 10 of the frame 11 shown in FIG.
are drilled into the upper and lower bent surfaces of the C-shaped channel of the frame 11, through which a rotation limiting piece of a ratchet 4, which will be described later, moves in and out. Further, 5 is the pivot hole 12
A circular plate spring arranged on one side of the intervening disk 13,
There is a through hole 51 in the center and three fastening holes 52, 5.
2, and a semicircular arc-shaped ear portion is integrally protruded toward the direction dividing the outer circumference into three equal parts, and the protruding pieces 53, 5
A dish-shaped protrusion is carved in the center of each of 3.

As shown in FIG. 4, the intervening disk 13 has a through hole 31' in the center and six notches, and a material is selected for its thickness that is thicker than that of the frame 11. .

On the other hand, 4 is a ratchet, and the ratchet 4 has a locking claw F carved over a predetermined section of about 70 degrees within quarter of the outer circumference that engages with the locking claw E of the pawl 2, and this A rotation limiter 43 is provided protrudingly at a position of about 50 degrees from one end of the locking claw F, and a rotation limiter 44 is similarly provided protrudingly provided at a position of about 218 degrees from the end of the other locking claw F, At the center of this rotation is a through hole 41.
is drilled there. Furthermore, three fastening holes 42, 4
2.42 are drilled. Then, on one side of the ratchet 4, the plate spring 5 is attached to the outside of the intervening disk 13 which is slightly protruding from the pivot hole 12 of the reinforcing plate 10 of the frame 11, and the plate spring 5 is also attached to the intervening disk 13. On the opposite side of
Each vertex of the plate-shaped projections is arranged so as to abut one side of the frame 11. and,
The aforementioned fastening holes 42, 42 and the fastening hole 5 of the leaf spring 5
2, 52 and the notch of the intermediate intervening disk 13 are aligned, and the caulking pins 6', 6' are overlapped to secure them in a sandwich-like manner, as shown in the sectional view of FIG. Furthermore, ratchet 4 and intervening disk 1
3. Align the through hole 41 and the through hole 31' in the center of the plate spring 5 with the through hole 51, insert the tightening bolt 7' of a predetermined diameter, and tighten it into the female thread 32 of the plate 31. It's dressed up.

Here, the reinforcing plate 10 of the frame 11
The armrest main body 1 is configured to be vertically adjustable in multiple stages and to be rotatable, using the pivot hole 12 as a supporting location.

Next, the eccentric pole 2 in the frame 11
The pole 2 is provided with a hook-shaped outer shape as a whole by a thick plate, and the other upper end of the pole 2 is provided with a cam surface 26 with an arc-shaped tip, and the hook protrusion on the lower side of the eccentric pole 2 At the end, a locking pawl E is carved over the entire tip of the eccentric arc, and the angle occupied by the total width of the pawl E of this pole 2 is approximately 15 degrees, and the number of teeth is Only three pieces are engraved.

Furthermore, a unit number of pivot holes 21 are bored in the center of this pole 2, and these pivot holes 21 are located adjacent to the pivot holes 12 of the reinforcing plate 10 of the frame 11. It is pivotally connected to a support hole 17 bored on the same line as the pivot hole 12 by a flanged support shaft 24 . Therefore, the angle occupied by the total width of the locking pawl E of the pawl 2 is about 15 degrees, and the number of teeth is 3. The range is secured up to 180 degrees, and the locking claws E and F in this embodiment
Due to the strength of the engagement and the strength of the tightening bolt 7', etc., this minimum adjustment angle is substantially equal to about 5 degrees.

Next, the shape of this eccentric cam 6 is entirely clam-shaped, and a pivot hole 61 is bored in the center of the eccentric cam 6.
The other upper corner has an arcuate tip and a hole for engaging the connecting rod 8.

At a position adjacent to the pivot hole 12 of the reinforcing plate 10 of the frame 11, a flanged support shaft 34 is inserted into a support hole 27 drilled on the same line as the pivot hole 12.
An eccentric cam 6 is pivotally mounted in parallel with the pole 2, and then a reinforcing plate 10 of this frame 11 is attached.
In the inner case, the pawl 2 with the cam surface 26 is brought into contact with and engaged with one piece of the eccentric cam 6 which is pivoted in parallel with the pawl 2 toward the front.

It is a matter of course that the eccentric cam 6 is reliably pivoted to the reinforcing plate 10 of the frame 11 in parallel with the pole 2, but each pivot hole of the frame 11, the pivot hole 17, the support hole 27, etc. All have a loose structure.

As a result of this assembly of the frame 11, the support shaft 3 and the ratchet 4 are tightened, and the above-mentioned pole 2 and the ratchet 4, which are backed up by the eccentric cam 6, are assembled in the frame 11 side in the normal seated state. , the arrangement is as shown in FIG.

Next, the connecting rod 8 will be explained in detail.The connecting rod 8 will be explained in detail.
A locking hole 65 etc. is bored in the upper corner, and this locking hole 65 and the through hole 15' near the front end of the arm 14 are connected to each other.
A linear connecting rod 8 is prepared as shown in FIG. The connecting rod 8 used therein has a long rectangular shape, and the upper end of the inverted L-shaped cross section is bent for reinforcement over the entire length, and the rear end 81 of the plate end has a pivot hole 85. is drilled. This pivot hole 85 and the locking hole 6
5 is rotatably supported by a flanged pivot shaft 35, and is inserted from the front side of the locking hole.

Further, at the front end of the frame 11, the connecting rod 8
The pivot end of the protruding arm 18'' connected to the front pivot end 82 of the frame 11 is inserted into the through hole 15 and has a half-moon link shape that projects slightly forward. length, and at the front end of the armrest body 1, its protruding end 18'
are presented in a seesaw shape. So, the protruding end 1
8' is locked at a link-shaped pivot point, and at this tip position, it is screwed onto the knob 7 from the outside with a screw to secure it.

In addition, a means for suspending the connecting rod 8 and the pole 2 will be explained. An L-shaped locking shape 16 is fixed outwardly in the middle of the rear of the connecting rod 8, and locking pieces 16 are implanted at key points of the pole 2.
It is assembled so as to be inserted through the bifurcated middle.
This connecting rod 8 is in contact with one side of the locking piece 16 in the frame 11 and is connected to the above-mentioned processed protrusion 83.
Hanging hook pieces at both ends of the coil spring 9 are interposed in the pole 2, and the free end of the pole 2 is always urged to be pulled toward the front cam surface.

[Operation]

As a result of the armrest 1 with the multi-stage angle adjustment mechanism having the above configuration, the operation knob 7 at the center of the front end of the armrest main body 1 slightly protrudes from the skin material of the armrest 1. The coil spring 9 is extended by pulling the knob 7 upward.
Suspend it and lock it on the hook piece.

Further, the free end of the front pole 2 inside the armrest main body cover 11 is pressed by the cam surface 26 of the eccentric cam 6 and rotates around the pivot hole 21 of the frame 11, and the above-mentioned frame 1
1 to the rotating side of the pivot hole 21, and the support shaft 2
The locking pawl E on the opposite side of the ratchet 4 is disengaged from the locking pawl F of the free end side of the ratchet 4 that is not in contact with the eccentric cam 6.

Next, when rotating downward, the armrest 1 may be rotated downward as desired while holding the front end of the armrest main body 1 while the armrest 1 is in an upright state.

After that, when you let go of your hand, the pole 2 pivoted on the support shaft 24 is biased in one direction by the elastic force of the elastic body such as the coil spring 9 of the connecting rod 8.
The free end of is pressed against the cam surface 26 of the cam 6 which is pivoted in the aforementioned parallel position. And, since it is easy to move to the aforementioned pivot hole 21 side,
The above-mentioned slidable locking claw E on the other end
moves in the opposite direction to the pivot end of the connecting rod 8, and the locking pawl E and the locking pawl F of the ratchet 4 engage and stop at a desired angle.

After that, when adjusting the lowering angle of the armrest main body 1, further adjust the armrest to a predetermined arm angle.
When the above-mentioned arm is lowered and the hand holding it is released, the resiliency of the elastic body such as the coil spring 9 of the connecting rod 8 causes the pole 2 fitted with the support shaft 24 etc.
However, by being able to swing freely at the center point,
It moves in the opposite direction to the clockwise direction, and the locking pawl E of the pawl 2 and the locking pawl F of the ratchet 4 engage with each other at an adjustment angle of 5 degrees and stop.

This armrest can be constructed with the above-mentioned multi-stage angle adjustment mechanism, and can also be improved and changed. Thus, the usability as an armrest can be significantly improved.

[Effect of idea]

Next, the effects of this idea will be listed.

(1) Since the reinforcing plate of the frame is rotatably sandwiched between the ratchet and other circumferential surfaces, the swingable eccentric cam, and the interposed disc and circular leaf spring at the supporting part, the adjustable armrest In the unlocking operation between the locking pawl E of the eccentric pole and the locking pawl F of the ratchet, at least the force is transmitted to the eccentric cam by lifting the tip knob upward while grasping the tip of the armrest. As a result, the operating force is amplified, and the locking pawl E of the eccentric pole and the locking pawl F of the ratchet, which transmit the motion at one end at the other end, are disengaged from each other.

In other words, whereas conventionally the other side of the pawl E of the pole was directly pulled so that the mutual engagement could be removed with a small force, the other side of the pawl E of the pole was pulled directly. By disposing the eccentric cam on the other side between the knob and the knob, the knob can be operated with a small force and disengaged.

(2) Moreover, by providing a unit bearing in the frame, and by transmitting force to the frame itself, the connecting rod inside it, and the eccentric cam,
The operating force is amplified, and the motion at one end is transmitted to the other end.Assuming that the mutual contact pressure between the pawl E and the ratchet pawl F remains unchanged, the tip of the knob Advantageously, undue stresses on the actuating link components and the pivot shaft, etc., on each other do not damage the adjusting device, which is allowed to do so by means of the tension spring.

Furthermore, even if the cam surfaces and the like mentioned above collide, the surface pressure on that surface is reduced, durability is ensured, and smooth engagement is possible, so the structure can be easily configured, and as a result, the component parts can be easily constructed. It is a device that can be made smaller and lighter, and has practical value.

[Brief explanation of drawings]

1 to 6 show an embodiment of this invention, in which FIG. 1 is a front view of the armrest angle adjustment device of this invention in an engaged state, FIG. 2 is a plan view thereof, and FIG. 1 is a sectional view taken along the line A-A in Fig. 1, Fig. 4 is an exploded perspective view of the angle adjustment device of this invention, Fig. 5 is a perspective view of the main components in an engaged state, and Fig. 6 is a perspective view of the entire seat. 7 and 8 are side views of conventional seats with armrests. 1...Armrest body, 2...Pole, 3...
...Support shaft, 4...Ratchet, 5...Circular leaf spring, 6...Eccentric cam, 7...Operation knob, 8...Connection rod, 9...Coil spring, 11...Armrest frame, 13...Intermediate Mounting disc, 26...cam surface,
80...Tightening bolt, E, F...Lock claw, S...
Seat, B... Seat back.

Claims (1)

[Scope of utility model registration request] In an armrest rotatably supported on the side surface of a seat back of a vehicle seat, a pivot hole is bored in the inner wall of the rear end of the armrest frame, and an intervening disk provided with a smaller diameter than the pivot hole is inserted into the pivot hole. A ratchet for adjusting the rotation of the frame is brought into contact with one side of the intervening disk, and a circular leaf spring is brought into contact with the opposite side, thereby pivoting the ratchet, the intervening disk, and the circular leaf spring. By tightening the bolts within the operating range around the support hole, the frame is rotatably held, and the frame is engaged and disengaged from the locking pawl around the ratchet in the middle, and pivoted in parallel at the other end. Transmits the rotating motion of one end of the eccentric cam incorporated to transmit the motion of the operating knob,
An armrest angle adjusting device characterized in that a pole with a cam surface is engaged with the other end of the pole in contact with the eccentric cam so as to transmit the transmission to the locking pawl E.