JPS6328926Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a movable armrest device.

[Technical background of the invention]

Armrests used for seats in vehicles, etc.
When not in use, you can store it on the backrest side and it will not get in the way. As a prior art of this type of movable armrest device, a structure shown in FIG. 11 has been provided by the present applicant. First, this prior art will be explained.

A fixed shaft 2 is fixed to the seat frame 1 shown in FIG. This fixed shaft 2 has a large diameter portion 2a
The rotating cylinder 3 is rotatably fitted into the small diameter part 2b. This rotary tube 3 is fixed to a portion 4a of the armrest main body 4.

A shaft locking coil spring 5 is provided across the outer circumferential surface of the large diameter portion 2a and the outer circumferential surface of the rotary cylinder 3. This coil spring 5 has a coil inner diameter such that it comes into close contact with both the outer circumferential surface of the large diameter portion 2a and the outer circumferential surface of the rotating cylinder 3 in the free state. One end 5a of this coil spring is locked to a locking portion 7 of the armrest main body. The other end 5b of the coil spring is free.

Further, an end member 9 is fixed to the end face of the fixed shaft 2. This end member 9 has a stopper wall 10 and a cam surface 11 at a position spaced from the stopper wall 10 in the circumferential direction.

Further, an oscillator 13 is provided near the rotary cylinder 3. This rocker 13 is rotatable about a pivot shaft 14, and is urged to rotate counterclockwise in the drawing by a return spring 15. This rocker 13
A recessed portion 16 is formed at one end side, and a stepped portion 17 is formed at the intermediate portion.

The prior art with the above configuration operates as illustrated in FIGS. 12 to 17. That is, FIG. 12 shows a state in which the armrest has been rotated to the uppermost position, which corresponds to position A in FIG. 4. In this position, the free end 5b of the coil spring 5 is fitted into the recess 16 while the coil spring 5 remains twisted in the unwinding direction (that is, the coil diameter is enlarged). Therefore, in this state, even if the armrest is lowered as shown in FIG. 13, the coil diameter remains expanded and no restraining force is applied. Therefore, the range from position A to just before position B in FIG. 4 is free in both the X and Y directions.

Furthermore, when the armrest is pushed down to position B (locking start position) in FIG.
1 and the oscillator 13 rotates. Therefore, the free end 5b of the coil spring 5 separates from the recess 16. As a result, the coil spring 5 returns to the tightening direction by its own elastic force, and its inner circumferential surface comes into close contact with the outer circumferential surface of the large diameter portion 2a and the outer circumferential surface of the rotary cylinder 3. In this state, if the rotary cylinder 3 is rotated in the Y direction with respect to the fixed shaft 2 as shown in FIG.
Since the rotating cylinder 3 rotates in the direction in which the coil spring 5 is unwound (in the direction in which the coil diameter increases), it is free in this Y direction. However, since the rotation in the X direction is the direction in which the coil spring 5 is tightened, rotation of the rotary cylinder 3 is prevented. That is, it is locked in the X direction.

Furthermore, if the armrest is rotated beyond the C position (unlocked position) in Fig. 4 from the above state,
The free end 5 of the coil spring as shown in FIG.
b hits the stopper wall 10 and the coil spring 5 is twisted in the unwinding direction, and this free end 5
b enters the stepped portion 17. Therefore, in this state,
Since the free end 5b of the coil spring 5 is restrained while being twisted in the unwinding direction, the rotary cylinder 3 can be rotated in either the forward or reverse direction. In other words, the armrest becomes free in both the X and Y directions. In this state, if the armrest is pushed down to position B again, it can be returned to the lock starting position shown in FIG. 14.

Furthermore, when the armrest is rotated to the front of position A shown in FIG. 4 with the free end 5b engaged with the stepped portion 17 as described above (as shown in FIG. 16), as shown in FIG. The coil spring 5 is further twisted in the unwinding direction while the free end 5b of the coil spring abuts against the stopper wall 10 so that the coil spring 5 is unwound. Therefore, the armrest is urged toward the C position between C and A by the repulsive force of the coil spring 5.

Further, when the armrest is completely rotated to position A, the coil spring 5 is twisted in the unwinding direction and the free end 5b fits into the recess 16, so that it returns to the state shown in FIG. 12, that is, the storage position without spring back. .

[Problems with the Background Art]

As can be seen from the above explanation, in the prior art, locking can be started and unlocked repeatedly in the range from position B to position C shown in FIG. You can keep it. However, in the prior art described above, the unlock position C is located considerably above, and the range between A and C is narrow. Therefore, when locking and unlocking are repeated, A-C
It would be more convenient to use a wider gap and be able to release the lock at the C' position, for example.

However, with the shape of the rocker 13 described above, in order to widen the distance between A and C, it is necessary to make the distance from the recess 16 to the step 17 considerably large. For this reason, the oscillator 13 becomes larger and requires a larger installation space, or it may not be possible to keep the oscillator 13 in a state without spring back at the A position due to the winding diameter of the coil spring 5.

[Purpose of invention]

Therefore, it is an object of the present invention to provide an armrest device that is easy to use and can increase the distance between A and C as described above.

[Summary of the idea]

The present invention includes a fixed shaft fixed to the seat frame side, a rotary cylinder provided on the armrest body and rotatably fitted to a part of the fixed shaft, and an outer peripheral surface of the fixed shaft and an outer periphery of the rotary cylinder. a coil spring for shaft locking, which is provided across the two surfaces and has a coil inner diameter such that it can come into close contact with the outer circumferential surfaces of both surfaces in a free state, and has one end locked to the armrest body and the other end free; a stopper wall provided on the fixed shaft and against which the free end of the coil spring hits when the armrest is rotated upward;
Applied to an armrest device including a cam surface provided at a position circumferentially apart from the stopper wall, and an oscillator provided near the rotary cylinder and rotatable around a pivot shaft. .

In the present invention, the pivot shaft is located in the middle part of the oscillator in the longitudinal direction, and the coil is attached to one end of the oscillator when the armrest is rotated up to the uppermost position. A recess into which the free end of the coil spring fits is provided, and a tip guide portion is provided that rides on the cam surface when the armrest is rotated and lowered to a locking start position, causing the free end of the coil spring to separate from the recess. Further, a stepped portion is provided on the other end side of the oscillator, and when the tip guide portion of the oscillator rides on the cam surface, the free end of the coil spring separated from the recessed portion The free end of the coil spring is allowed to move beyond this stepped portion toward the stopper wall, and when the armrest is rotated upward beyond the unlocked position, the free end of the coil spring is inserted between this stepped portion and the recessed portion. is located, the oscillator is rotated back by the return spring, and the free end of the coil spring comes into contact with this step.

In the present invention with the above configuration, when the armrest is rotated and raised to the top (storage position),
By fitting the free end of the coil spring into the recess of the rocker, the coil spring is held in a twisted state in the unwinding direction. In this state, X, Y
It is free in both directions and does not cause spring back.

On the other hand, when the armrest is rotated and lowered to the locking start position, the tip guide portion of the rocker rides on the cam surface, and the free end of the coil spring separates from the recess. In this way, the coil spring becomes free and wraps around the fixed shaft and the outer peripheral surface of the rotating cylinder. Thus, it is free in the Y direction and locked in the X direction.

Furthermore, when the armrest is rotated upward beyond the unlocked position, the rocker returns to a position where the stepped portion touches the free end of the coil spring, and the armrest is moved upward by the elastic force of the coil spring. An urging force is applied in the direction (X direction) of returning to the unlocked position.

According to the above configuration, the distance from the storage position to the lock release position can be made wider than that of the conventional one, and it is convenient to use when repeating lock start → lock release, or lock release → lock start. Become.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.

The seat frame 20 shown in FIG. 1 is provided with an armrest attachment portion 20a, and a square hole 21 is formed in this attachment portion 20a.
Then, the base end 23c of the fixed shaft 23 is inserted into the square hole 21.
is fixed.

The fixed shaft 23 has a large diameter portion 23a and a small diameter portion 23.
b, and the rotary cylinder 25 is rotatably fitted into the small diameter portion 23b. This rotating cylinder 25 is fixed to a portion 26a of the armrest main body 26. Therefore, the rotating cylinder 25 rotates together with the armrest main body 26.

The outer peripheral surface of the large diameter portion 23a and the rotating cylinder 25
A coil spring 28 for shaft locking is provided across the outer peripheral surface of the shaft. In the free state, this coil spring 28 is connected to the outer peripheral surface of the large diameter portion 23a and the rotary cylinder 2.
The inner diameter of the coil is such that it can be brought into close contact with both of the outer peripheral surfaces of the coil. The wire of the coil spring 28 has a rectangular cross section. Further, one end side 28a of the coil spring is locked to a locking portion 30 provided on the armrest main body 26. The other end side 28b of the coil spring is in a free state. As shown in FIG. 1, the free end 28b of the coil spring 28 is bent into a substantially L shape along the axial direction of the coil spring 28.

Further, an end member 31 is fixed to the end surface of the fixed shaft 23. The end member 31 has a protruding stopper wall 32 and a protruding cam surface 33 at a position spaced from the stopper wall 32 in the circumferential direction. 34 is an arc-shaped long hole, and this long hole 3
4 includes a convex portion 35 formed on the end surface of the fixed shaft 23.
is inserted. Then, the end member 31 and the fixed shaft 23 are integrated with the screw 36 into the mounting portion 2.
Fixed to 0a.

Further, an oscillator 38 is provided near the rotary cylinder 25. The rocker 38 is rotatable about a pivot 40 and is biased to rotate counterclockwise in the drawing by a return spring 41.

The pivot 40 of the oscillator 38 is located at an intermediate portion in the longitudinal direction. and the second
As shown in the figure and FIG. 3, a recess 43 and a tip guide portion 44 are provided at one end of the oscillator 38. Further, a step portion 46 is provided on the other end side of the rocker 38 .

The recess 43 is provided so that the free end 28b of the coil spring 28 is fitted into the recess 43 when the armrest is rotated upward to the uppermost position (to position A in FIG. 4). Further, when the armrest is rotated and lowered to the locking start position (position B in FIG. 4), the tip guide portion 44 rides on the cam surface 33 and rotates the oscillator 38, causing the free end 28b of the coil spring to rotate.
is removed from the recess 43.

On the other hand, when the tip guide portion 44 rides on the cam surface 33, the step portion 46 is attached to the free end 2 separated from the recess 43, as shown in FIG.
8b is allowed to move beyond this stepped portion 46 to the stopper wall 32 side. Moreover, this step 46
The armrest is in the unlocked position (see Figure 4).
When the rotation is raised above C' position), the 9th
As shown, the free end 28b of the coil spring
is located between the stepped portion 46 and the recessed portion 43, the oscillator 38 is rotated back by the return spring 41, and the free end 28b of the coil spring is brought into contact with the stepped portion 46. be.

One embodiment configured as described above operates as shown in FIGS. 5 to 10.

That is, FIG. 5 shows a state in which the armrest has been rotated to the uppermost position, which corresponds to position A in FIG. 4. In this position, coil spring 2
8 has its free end 28b fitted into the recess 43 while being twisted in the unwinding direction (with the coil diameter expanded). Therefore, in this state, even if the armrest is lowered as shown in FIG. 6, the coil diameter remains enlarged and no restraining force is applied. Therefore, the range from position A to just before position B in FIG. 4 is free in both the X and Y directions.

Also, move the armrest to position B (locking start position).
When pressed down, the tip guide portion 44 of the oscillator 38 rides on the cam surface 33, as shown in FIG. 7, and the oscillator 38 rotates. Therefore, the free end 28b of the coil spring 28 separates from the recess 43. As a result, the coil spring 28 returns to the tightening direction due to its own elastic force, and the free end 28b
, and moves to the stopper wall 32 side. In this way, the coil spring 28 becomes free, and its inner circumferential surface wraps around both the outer circumferential surface of the large diameter portion 23a and the outer circumferential surface of the rotary cylinder 25. In this state, if the rotating barrel 25 is rotated in the Y direction with respect to the fixed shaft 23 as shown in FIG. 8, the rotating barrel 25 will rotate in the direction in which the coil spring 28 is unwound (the direction in which the coil diameter increases) ,
It is free in this Y direction. Moreover, since the rotation in the X direction is in the tightening direction of the coil spring 28, the rotation of the rotary cylinder 25 is prevented. That is, it is locked in the X direction.

Furthermore, when the armrest is rotated upward from the above state (the state shown in FIGS. 8 and 18) to the C' position (unlocked position) shown in FIG. As the fixed end 28a of the coil spring 28 is further rotated clockwise in the figure while the free end 28b of the coil spring 28 is in contact with the stopper wall 32, the coil spring 28 is further twisted in the unwinding direction. , as shown in FIGS. 10 and 20, while the free end 28b of the coil spring hits the stopper wall 32 and is stopped, the stepped portion 46 passes under the free end 28b, thereby removing the free end 28b. is located between the stepped portion 46 and the recessed portion 43. When this state is reached, the oscillator 38 stops at the position where it has rotated counterclockwise in the figure around the shaft 40 due to the elasticity of the return spring 41, so that the stepped portion 46 is placed in front of the free end 28b of the coil spring. You will be able to come across it. Therefore, in this state, when an attempt is made to rotate the armrest main body 26 from the C' position toward the storage position A, only the fixed end 28a is twisted clockwise in the figure while the free end 28b does not move. The armrest main body 26 is returned to the C' position by the repulsive force. Furthermore, in this state, the coil spring 28 is twisted in the unwinding direction and the diameter is expanded while the opening angle between the free end 28b and the fixed end 28a is maintained, so that a force is applied to the armrest main body 26 in the counterclockwise direction as shown in the figure. If you give it, you can knock it towards position B. i.e.
When in the C' position, the armrest main body 26 can be moved by hand in both the X and Y directions in FIG. However, since a frictional force is exerted between the rotary tube 25 and the fixed shaft 23, the armrest main body 26 will not fall in the direction of the B position in a free state where no external force is applied. As described above
Forcibly move the armrest body 26 at position C' to B
When the armrest body 26 is pushed down to the position B, the free end 28b remains in contact with the stepped portion 46 (that is, the opening angle between the free end 28b and the fixed end 28a remains fixed) until just before reaching the B position. When it rotates counterclockwise as shown in the figure and finally reaches position B, the tip guide portion 4 is rotated as shown in FIG.
4 rides on the cam surface 33, the oscillator 38 is displaced clockwise in the figure around the shaft 40, and the stepped portion 46
As the free end 28b is disengaged from the free end 28b, the free end 28b can pass through the stepped portion 46, so that the coil spring 28 returns to the tightening direction by its own elasticity. thus,
It is possible to return to the lock starting position described above.

Also, as described above (as shown in Figure 9), the free end 2
8b is in contact with the stopper wall 32, and when the armrest is rotated to the front of the A position shown in FIG. 4, the free end 28b of the coil spring is in contact with the stopper wall 32 as shown in FIG. In this state, the coil spring 28 is further twisted in the unwinding direction. Therefore, the armrest is urged in the X direction between C' and A by the repulsive force of the coil spring 28 itself.

Further, when the armrest is completely rotated to position A, the free end 28b of the coil spring 28 hits the stopper wall 32, and the fixed end 28b remains stopped.
8a and the rocker 38 rotate clockwise in the figure together with the armrest main body 26, the free end 2
8b is fitted into the recess 43 again and returns to the state shown in FIG. 5, that is, the storage position without spring back.

As can be seen from the above description, according to the above embodiment, lock initiation and lock release can be repeated in the range from position B to position C' shown in FIG. can be left in the state.

By using the rocker 38, A
Since the distance between -C' can be made wider, it becomes easier to repeat lock start → lock release or lock release → lock start.

[Effect of idea]

As described above, according to the present invention, the distance between A and C' can be increased, and an armrest device that is easy to use can be obtained.

[Brief explanation of the drawing]

1 to 10 show an embodiment of the present invention, and FIG. 1 is an exploded perspective view of the armrest device;
Figure 2 is a front view of the rocker, Figure 3 is a side view of the rocker, Figure 4 is a side view of the seat showing the positional relationship of the armrests, and Figures 5 to 10 are in different operating states. FIG. 11th
The figure is an exploded perspective view showing the prior art, FIGS. 12 to 17 are front views showing different operating states of the armrest device shown in FIG. 11, and FIG. 18 is the same as shown in FIG. 8. FIG. 19 is a perspective view of a portion of the armrest device in the state shown in FIG. 9;
FIG. 20 is a perspective view of a portion of the armrest device in the state shown in FIG. 10. 20...Seat frame, 23...Fixed shaft, 2
5...Rotating tube, 26...Armrest body, 28
...Coil spring for shaft locking, 28a...One end side (fixed end), 28b...Other end side (free end), 32...
... Stopper wall, 33 ... Cam surface, 38 ... Rocker, 40 ... Pivot, 41 ... Return spring, 43 ... Recess, 44 ... Tip guide section, 46
...Danbe.

Claims (1)

[Claims for Utility Model Registration] Fixed shaft 23 fixed to the seat frame 20 side
a rotary tube 25 provided on the armrest main body 26 and rotatably fitted to a portion of the fixed shaft 23; provided across the outer circumferential surface of the fixed shaft 23 and the outer circumferential surface of the rotary tube 25; In a free state, the coil has an inner diameter such that it can come into close contact with the outer peripheral surfaces of both, and one end 28a side is connected to the armrest main body 2.
6, the other end 28b side is free, and the coil spring 28 is provided on the fixed shaft 23, and when the armrest main body 26 is rotated upward, the free end 28b of the coil spring 28 sticks out. The stopper wall 32 that hits, and the armrest body 2 against this stopper wall 32.
A cam surface 33 provided at a distance in the rotational circumferential direction on which the rotating cylinder 6 rotates and descends, and a pivot shaft 40 provided near the rotating cylinder 25.
An armrest device including an oscillator 38 that is rotatable around the oscillator 38, wherein the oscillator 38 has the pivot shaft 40 located at an intermediate portion thereof in the longitudinal direction;
One end side is provided with a recess 43 into which the free end 28b of the coil spring 28 is fitted when the armrest body 26 is rotated up to the storage position A, and when the armrest body 26 is rotated down to the locking start position B. A tip guide portion 44 is provided that rides on the cam surface 33 at the position where the coil spring 28 is moved, and detaches the free end 28b of the coil spring 28 from the recess 43. Furthermore, a step portion 46 is provided on the other end side of the oscillator 38. This stepped portion 46 allows the free end 28b of the coil spring detached from the recessed portion 43 to pass over this stepped portion 46 when the tip guide portion 44 of the rocker 38 rides on the cam surface 33. The free end of the coil spring 28 is allowed to move toward the stopper wall 32, and when the armrest main body 26 is rotated upward beyond the unlocked position C', the free end of the coil spring 28 is
8b abuts against the stopper wall 32, and the stepped portion 46 passes through the free end 28b and moves in the rotational upward direction of the armrest body 26. The armrest main body 26 passes through the free end 28b.
The step part 46 is biased by the elasticity of the return spring 41 so as to return to a rotational position where it can abut against the free end 28b when the step part 46 is moved in the rotational upward direction. Armrest device.