JP2826046B2 - Armrest device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armrest device, and more particularly, to an armrest device mounted on an automobile seat, in which a falling / standing angle of an armrest main body is continuously changed substantially steplessly. It relates to an angle adjusting mechanism.

[0002]

2. Description of the Related Art In a conventional armrest device for a vehicle seat, as disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 2-52643, a shaft lock system is adopted as a mechanism for adjusting the tilting / standing angle of the armrest. The axis lock method is
As a means for rotating / positioning the armrest, it is general to incorporate a coil spring having an inner diameter slightly smaller than the outer diameter into a pivot for armrest rotation. With the coil spring fitted on the support shaft, the support shaft is fixed to the body of the armrest, and one end of the coil spring is fixed to the body of the armrest, and the other end of the coil spring is turned in the direction opposite to the winding direction. By rotating, the inner diameter of the coil spring is made larger than the outer diameter of the shaft to loosen the tightening force, thereby holding the support shaft and the coil spring in a relatively rotatable manner, thereby swinging the main body of the armrest. I have. Conversely, when the other end of the coil spring is rotated in the same direction as the winding direction, the diameter of the coil spring is reduced, and the tightening force acting on the support shaft is increased. The springs return to a state in which they cannot rotate with each other, and the main body of the armrest is positioned and fixed at a predetermined stop position.

[0003]

SUMMARY OF THE INVENTION
When rotating the armrest body from a predetermined position to a new position, it is necessary to release the lock by the coil spring, and the armrest device is provided with a lock release mechanism including a number of components. As a result, the conventional armrest device is accompanied by problems such as a complicated structure, an increase in weight, and an increase in manufacturing cost.

[0004]

[MEANS FOR SOLVING THE PROBLEMS]
The present invention relates to a seat frame.(16)Sideways from the side edge of
Protruding fixed shaft(5)The base is rotatably fitted on top
Base plate structure(2)And the above fixed shaft(5)
Plate with its base fitted in(6)And this static
Stop plate(6)ToA predetermined distance from the fixed shaft (5)
didpivot(14)Attached so that it can swing through
Claw member(7)And the stationary plate above(6)One on top
The other end is inserted and supported swingably.
The Y-shaped claw member(7)Provided at the first tip of the
A torsion coil spring slidably fitted into the support hole(8)
And the base plate structure above(2)Fixed on the above
Y-shaped claw member(7)On the second tip ofAbove fixed shaft
Projecting in the direction away from (5)Formed nails(13)
On the opposite surfaceFacing the fixed shaft (5) sideSerrated teeth
(10)And the Y-shaped claw member
(7)Protrusion formed on the third tip of the(11)And pair
Facing, the above-mentioned serrations(10)Bite the end of
Projection for disengagement and engagement start(12)Form
Ratchet(3)And by the armrest body(1
8)Features a mechanism for adjusting the lodging / standing angle of the vehicle
Armrest device(20)To provide
You.

[0005]

The torsion coil spring presses the teeth in the approaching direction toward the teeth in a section where the saw teeth of the ratchet and the teeth formed at one end of the Y-shaped claw member face each other. The armrest body is positioned and fixed at a predetermined stop position by urging and holding the both in an engaged state. Also,
In a section where the ratchet serrations and the pawl formed at one end of the Y-shaped pawl member are not opposed to each other, the torsion coil spring biases the pawls in a direction away from the serrations. Thereby, the armrest main body is held in a rotatable state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1, 2 and 7, an armrest device (20) projects laterally from a side end of a seat frame (16) on a backrest side into a frame rotating shaft guide (4). A base plate assembly (2) whose base end is rotatably fitted into a fixed shaft (5), and the fixed shaft (5).
The base end is fixedly fitted in the nut, and the tightening nut (9)
Stationary plate (6) fixed to seat frame (16) with
And a Y-shaped pawl member (7) swingably attached to the stationary plate (6) via a pivot (14), and one end (8A) on the stationary plate (6). A torsion coil spring that is swingably fitted and supported and the other end (8B) is swingably fitted into a support hole provided at a first end of the Y-shaped claw member (7). (8) and the Y-shaped claw member (7) fixed on the base plate structure (2).
A serrated tooth row (10) is arranged in an arc shape on the surface facing the tooth claw (13) formed at the second tip of the claw member, and is formed on the third tip of the Y-shaped claw member. Projections (1
The armrest body is formed by combining a ratchet (3) having a projection (12) for disengaging and starting engagement at the end portion B of the saw-toothed tooth row (10) so as to face 1). The mechanism for adjusting the inclination / standing angle of (18) is formed.

The base plate assembly (2) to which the ratchet (3) is fixed is revolved around a stationary plate (6) about a fixed shaft (5) as a rotation center as shown by an arrow S in FIG. By engaging the row (10) with the pawl (13), the armrest device (20) is positioned and fixed at an arbitrary position between the maximum drawer fixing position A and the minimum drawer fixing position B.

On the other hand, the base plate assembly (2) is revolved around the fixed shaft (5) while the meshing state between the serrations (10) and the pawls (13) is released, so that the armrest device (20) is rotated. ) The seat frame on the back side (16)
It is stored between.

As shown in FIGS. 4 and 5, the torsion coil spring (8) is a pressing biasing member formed by winding a small diameter spring steel having a circular cross section in a coil shape, and has one end (8A). And the other end (8B) is maintained at an interval of Wf in a no-load state, and when incorporated between the stationary plate (6) and the Y-shaped claw member (7), the interval Ws is smaller than the interval Wf. The coil diameter and the extending direction from the coil portion are selected so that a predetermined compressive load can be generated. As shown in FIG. 4, one end (8A) of the torsion coil spring (8) is swingably fitted into a hole provided in the stationary plate (6), and the other end (8B) is Y-shaped pawl. The stationary plate (6) is swingably fitted into a support hole provided at a first end portion of the member (7).
And a Y which is swingably mounted around a pivot (14).
A predetermined compressive load is applied between the U-shaped claw member (7).

In the armrest device (20), the relative assembling positions of the pivot (14), the torsion coil spring (8), the Y-shaped claw member (7), and the ratchet (3) are shown in FIGS. As shown in A), the serrations (10) of the ratchet (3) and the pawls (13) formed at the second tip of the Y-shaped pawl member (7) are held in opposition. in section (from point a to point B) that, at one end and (8A) pivot at one end of the torsion coil spring (8) (8A) and the other end coil straight line L ₂ connecting the (8B) is a torsion spring (8) ( upper straight line L ₁ connecting the center O ₂ of 14), i.e., is adjusted to be located between the pivot (14) and the serrated teeth (10). As a result, when the base plate assembly (2) rotates in the section from the point A to the point B about the fixed shaft (5) as the center of rotation, the teeth (1)
The pressing load P toward the ratchet (3) is transmitted to (3).

While satisfying the above conditions, the pivot (14), the torsion coil spring (8), the Y-shaped claw member (7), and the ratchet (3) are, as shown in FIG. 3) is in a non-opposed state (from point B to point C), one end (8A) and the other end (8A) of the torsion coil spring (8).
One end of the straight line L ₂ is torsion coil spring connecting B) (8) (8A)
Lower or, in the straight line L ₁ connecting the center O ₂ of the pivot (14) and FIG. 4
The positions of these components are adjusted so that they can be located on the opposite side of the position shown in FIG. As a result, when the base plate assembly (2) rotates in the section from the point B to the point C about the fixed shaft (5) as the center of rotation, the Y-shaped claw member (7) is provided with a saw tooth (13). A disengagement load R that is pressed and urged in the separating direction is transmitted from the tooth row (10).

[0012] center of the one end (8A) and pivot (14) at one end of the torsion coil spring (8) in the course of the rotation (8A) and the other end coil straight line L ₂ connecting the (8B) is a torsion spring (8) when the Tsu polymerized with lines L ₁ connecting the O _2, the energy storage amount of the torsion coil spring (8) is maximized.

FIG. 3 shows the relative relationship between the base plate assembly (2) and the ratchet (3) and a Y-shaped claw member (7) which is swingably mounted on a stationary plate (6) via a pivot (14). It is an operation | movement figure explaining the change of a position in the state which reversed the movable side (2) (3) and the fixed side (6) (7). More specifically, in FIG. 3, for convenience,
Center O ₂ of the Y-shaped pawl member (7) fixed shaft around a revolves counterclockwise Egai the R1 becomes rotation radius axis of (5) (14), O '2, O''2, O ''' ₂ , but in the actual armrest device (20), the center position O ₂ of the pivot (14) is unchanged, and the rotating frame (1) and the ratchet (3) are The relative position between the ratchet (3) and the Y-shaped claw member (7) is set to the point A by revolving the fixed base frame structure (2) clockwise around the fixed shaft (5) while maintaining the integral structure. From point B, then B
It changes sequentially from point to point C. FIG. 7 schematically shows the actual movement of the armrest device (20).

In designing the armrest device (20), the stop positioning angle of the armrest body (18) (from point A to point B)
If you want expand the angular range theta) up to the point, either to increase the width of the ratchet along the tooth row direction (3), until serrated teeth from the center O ₁ of the fixed shaft (5) (10) To reduce the distance. Conversely, when it is desired to reduce the stop positioning angle (the angle range θ from the point A to the point B) of the armrest body (18), it is necessary to reduce the width of the ratchet (3) in the tooth row direction. , to the center O ₁ of the fixed shaft (5) to increase the distance to the serrated teeth (10).

The stop positioning angle θ of the armrest body (18) can be set to an arbitrary size. In any case, during the rotational movement from the point A to the point C, the tooth claw ( After the meshing state between the teeth 13) and the serrations (10) is released, the teeth (13) slide along the inner inclined surfaces of the protrusions (12) for releasing the teeth, so that the Y-shaped claw member is formed. (7) moves outside the ratchet (3), and the armrest main body (18) is held so that the base plate assembly (2) and the armrest main body (18) incorporating the base frame assembly (2) are freely rotated. Select the rotation range of 18). By pivoting the body (18) of the armrest from point A to the position (18 ″) as shown in FIG. 7, the body (18) of the armrest is moved to the seat frame (16) on the backrest side.
Is stored in an inverted state beside the.

In order to return the armrest body (18) from the storage position C to the use position (the area from point B to point A), as shown in FIGS. 1, 2 and 7, the armrest body (18) is used. Is reversely rotated about the fixed axis (5) for each base frame structure (2). A projection (1) formed on the third tip of the Y-shaped claw member (7) during the reverse rotation.
1) meshes with a projection (12) provided at the end point B of the serrated tooth row (10), thereby forming a Y-shaped claw member (7).
Generates a swing motion about the pivot (14),
At the point A at the innermost part of the toothed tooth row (10), the tooth claw (13) and the toothed tooth row (10) are engaged. Thereafter, by changing the meshing position of the tooth claw (13) and the serrated tooth row (10) between the point A and the point B, the main body (18) of the armrest is moved to a predetermined stop position at a desired inclination angle. Is fixed. The Y-shaped claw member (7) adjusts the shape of the claw (13) according to the mounting position of the ratchet (3) and the alignment dimension of the serrated tooth row (10). The Y-shaped claw member (7) shown in FIG. 1, FIG. 2 and FIG.
Although a single tooth (13) is formed, the scope of the invention is not to be construed as being limited by this illustrative description, but encompasses many variations as long as the predetermined strength is compensated. be able to. For example, as shown in FIG. 5, it is also possible to use a Y-shaped claw member (7) in which one thick and slightly large tooth (13) is formed at the second tip.

A torsion coil spring (8) shown in FIG.
Is a center diameter of a spring steel material having a circular cross section of 1 mm in diameter.
10mm, wound in a coil with 33/8 turns, 11mm when assembled between one end (8A) and the other end (8B), and 14mm when no load
mm is designed to maintain the spacing,
However, the present invention is not limited to this, and the dimensions of the torsion coil spring (8) are determined according to the magnitude of the pressing load P applied between the pawl (13) and the saw-toothed tooth row (10). Select the constant size of the spring.

In any of the embodiments, the torsion coil spring (8) is incorporated into the armrest device (20) so that the ratchet (3) has a Y-shape in the area from the point A to the point B in FIGS. The pressing force is transmitted from the pawl member (7), and conversely, the area where the pawl (13) is displaced from the serrated tooth row (10) of the ratchet (3) (from the point B in FIGS. 1, 2 and 7) In the area up to the point C), the tooth claw (13) of the Y-shaped claw member (7) is moved in the non-meshing direction, that is, in the direction of releasing the pressing load.
0) is pressed.

[0019]

The armrest device according to the present invention (20)
Is a base frame structure (2), a stationary plate (6),
A combination of a Y-shaped claw member (7), a ratchet (3), a torsion coil spring (8), a fixed shaft (5) and a pivot (14), which is an essential component in a conventional armrest device. The stepless adjustment of the tilting / standing angle θ of the armrest body (18) is enabled without using a complicated lock release mechanism. The structure of the armrest operating portion is simplified by the elimination of the lock release mechanism, and at the same time, the weight is promoted by the reduced number of components, and the space of the armrest portion is easily enlarged. As a result, the failure of the armrest is reduced and the usability is improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an armrest device according to the present invention,

FIG. 2 is a front view of the armrest device,

FIG. 3 is an explanatory view illustrating the operation order of the armrest device in a state where the movable side and the fixed side are reversed.

FIG. 4A is a front view showing a meshing engagement state between a Y-shaped claw member and a ratchet, and FIG. 4B is a front view showing a separated state of the constituent members.

5A is a front view of a torsion coil spring, and FIG. 5B is a side view thereof.

FIG. 6 is a front view showing a modification of the Y-shaped claw member.

FIG. 7 is an explanatory diagram of an operation sequence of the armrest device.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 rotating frame 2 base plate structure 3 ratchet 4 frame rotating shaft guide 5 fixed shaft 6 stationary plate 7 Y-shaped claw member 8 torsion coil spring 8A one end of torsion coil spring 8B other end of torsion coil spring 9 tightening nut 10 sawtooth Tooth row 11 Projection 12 Projection 13 Tooth pawl 14 Axis 16 Backrest-side seat frame 18 Armrest body L1 _One end (8A) of torsion coil spring (8) and pivot (1)
The other end to one end (8A) of the center (O ₂₎ connecting the straight line L ₂ torsion coil spring (8) 4) (8
B) Straight line connecting 20) Armrest device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-69493 (JP, A) Jikken 63-22912 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47C 7/54

Claims (1)

(57) [Claims] 1. A base plate assembly (2) having a base portion rotatably fitted on a fixed shaft (5) projecting laterally from a side end of a seat frame (16) ;
(5) a stationary plate (6) fitted with the base part,
A predetermined distance from the stationary shaft (5) is applied to the stationary plate (6).
A Y-shaped claw member (7), which is swingably attached via a pivot (14) that is separated , and one end is swingably fitted and supported on the stationary plate (6) ; A torsion coil spring in which the end of the torsion coil is swingably fitted into a support hole provided at a first end of the Y-shaped claw member (7) .
And (8), it is fixed on the base plate structure (2), the solid on the second end portion of the Y-shaped pawl member (7)
Teijiku (5) the pawl being protruding in a direction away from (1
3) The serrated tooth row (10) facing the fixed shaft (5) side is aligned and arranged on the surface facing 3), and the Y-shaped claw member is arranged.
A projection (12) for disengaging and starting meshing is formed at the end of the saw-tooth tooth row (10) so as to face the projection (11) formed on the third tip of (7) . With the ratchet (3) , the armrest body (1
8) The armrest device (20), wherein the mechanism for adjusting the inclination / standing angle according to ( 8) is formed.