JPH11221133A - Arm rest attaching structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To offer an arm rest attaching structure of simple configuration and with excellent effectiveness in attaching operation. SOLUTION: In normal service, a moving pin 5 of an arm rest 3 is not able to pass a throat 21 of a groove 13, and therefore, the arm rest 3 will never slip off undeliberately. If a button 9 is pushed when the pin 5 reaches the accommodation position as inlet to the throat, the pin 5 is able to pass the throat and will intrude into the attaching/detaching range Y, so that the arm rest 3 can be mounted and removed easily. Owing to a coil spring (energizing means) 20 provided to push the pin 5 in the direction of retracting, the arm rest 3 will never rattle to the left and right.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable structure of an armrest provided on a side portion of a seat back.

[0002]

2. Description of the Related Art As shown in Japanese Utility Model Laid-Open Publication No. 4-51254, some armrests attached to the side portions of a seatback have a structure that can be removed when not in use. This type of detachable armrest has a shaft hole on the seatback side for inserting a shaft pin of the armrest, and a locking means for engaging and disengaging the shaft pin is provided in the shaft hole. That is, when used, the shaft pin is rotatably supported in a locked state where the shaft pin is prevented from coming off, and when not in use, the lever of the locking means is operated to release the locked state of the shaft pin and the armrest can be removed. I have.

[0003]

However, in such a conventional technique, a complicated locking mechanism must be built in the shaft hole of the seat back, and the backlash between the locking means and the shaft pin in the left-right direction is required. Since the sticking cannot be prevented, the manufacture of the seat back becomes troublesome and causes rattling. Further, since the armrest cannot be attached or detached unless the lever of the lock function is operated, the armrest is supported by one hand and the lever is operated by the other hand, and the detachability is not good.

The present invention has been made by paying attention to such a conventional technique, and provides an armrest attaching / detaching structure having a simple structure, no rattling noise, and excellent in attaching / detaching workability. .

[0005]

According to the first aspect of the present invention,
A fixed shaft pin and a movable pin which can be moved up and down are erected on the inner surface of the base end portion of the armrest, and the shaft pin is inserted into the side of the seat back and the shaft pin is moved along an arc locus around the shaft pin. A groove for inserting a moving pin is formed, and the groove extends to a normal range from a use position in which the armrest is directed forward to a storage position in which the armrest is directed upward, and to a detachable position in which the armrest is slightly backward from the storage state. It consists of a detachable range, the normal range and the detachable range are connected by a narrow portion, and one end of the moving pin prevents the groove from coming off in the normal range and prevents the groove from coming off in the detachable range. A flange portion having a dimension that allows it, a first step portion formed at the base side of the flange portion and having a dimension that can move in a normal range and cannot move a narrow portion, and a root side of the first step portion. The narrow part is formed A second step portion having a possible dimension, and a biasing means for pressing the moving pin in a retracting direction is provided, and a button portion for pressing the moving pin in a protruding direction is provided on an outer surface of a base end portion of the armrest. It is characterized by being provided.

According to the first aspect of the present invention, since there is no need to provide a lock mechanism on the seatback side for engaging with the shaft pin of the armrest, the manufacture of the seatback is simplified. Also, during normal use, the armrest's moving pin cannot pass through the narrow part of the groove, so the armrest does not come out carelessly, but when the armrest's moving pin reaches the storage position that becomes the entrance of the narrow part. If you press the button,
Since the moving pin can pass through the narrow portion and the moving pin enters the detachable range, the armrest can be easily attached and detached. Further, since the urging means for pressing the moving pin in the retracting direction is provided, the armrest does not rattle in the left-right direction.

According to a second aspect of the present invention, there is provided the armrest attaching / detaching structure according to the first aspect, wherein the button portion is provided at the other end of the movable pin integrally extended to the outer surface of the base end of the armrest. It is characterized by being formed.

According to the second aspect of the present invention, since the button is formed at the other end of the moving pin, the number of components can be reduced.

According to a third aspect of the present invention, there is provided the armrest attaching / detaching structure according to the first or second aspect, wherein the biasing means is a coil spring provided on a movable pin.

According to the third aspect of the present invention, since the urging means is a coil spring provided on the movable pin, it can be installed in a narrow space in the armrest.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention is shown in FIGS.
Explanation will be given based on FIG. Reference numeral 1 shown in FIG. 1 denotes an automobile seat, and an armrest 3 is rotatably attached to a side of a seat back 2 of the automobile.

The inner surface of the base end of the armrest 3 is shown in FIG.
As shown in the figure, the shaft pin 4 and the moving pin 5 are provided upright. The shaft pin 4 has a simple shaft shape, but one end of the moving pin 5 has a substantially mushroom shape. That is, as shown in FIG. 2, the flange portion 6 of large diameter D _1, toward the base side, a first step portion 7 having the middle diameter D _2, and a second stage portion 8 of a small diameter D ₃ . Such a change in diameter of the moving pin 5 is as follows.
Done only in one direction crossing the axial pin 4 in an arc trajectory centered, in the other direction is the same diameter as the diameter D _1. The moving pin 5 is not limited to a circle but may be a corner or a polygon. Therefore, the “diameter” is used in the above description, but the diameter is, of course, difficult to be “dimension”.

The moving pin 5 has the other end formed as a button 9 extending to the outer surface of the base end of the armrest 3, and the button 9 is exposed from the escutcheon 18 to the outside. The movable pin 5 is movable along the longitudinal direction, and one end of the movable pin 5 is allowed to protrude and retract. Between the E-ring 19 provided on the other end side of the moving pin 5 and the inner bracket 22 of the armrest 3, a coil spring 20 is provided as "urging means" in a state of being externally mounted on the moving pin 5. Have been. Therefore, the moving pin 5
It is constantly urged in the direction of retracting into the armrest 3.

On the other hand, the fixing portion 2 on the side of the seat back 2
As shown in FIG. 3, a metal armrest bracket 10 is fixed to a and 2b by bolts (not shown) that penetrate through lower through holes 10a and 10a on the lower side of the armrest bracket 10, and a resin bracket 16 on the upper side. Cylindrical body 16
It is fixed by a bolt (not shown) inserted into the a. The cylindrical body 16a of the resin bracket 16 is engaged with the concave portion 17 of the armrest bracket 10, and when a large load is applied to the seat back 2, the cylindrical body 16a can come out of the concave portion 17. The clip portion 16 b of the resin bracket 16 is engaged with an engagement hole 17 a of the armrest bracket 10.

Armrest finisher 11 made of resin
Is fixed to an engaging hole (not shown) of the armrest bracket 10 with a clip 11a.

Since there is no need to provide the seat back 2 with a conventional locking mechanism for engaging with the shaft pin 4 of the armrest 3, the structure of the seat back 2 is simpler than the conventional one.

The armrest finisher 11 includes:
A shaft hole 12 into which the shaft pin 4 is inserted and a groove 13 into which the moving pin 5 is inserted are formed. The armrest bracket 10 is formed with a shaft hole 14 and a notch 15 having a shape corresponding to the groove 13.

As shown in FIG. 4, a groove 13 formed in the armrest finisher 11 has a normal range X extending from a use position A in which the armrest 3 is directed forward to a storage position B in which the armrest 3 is directed upward, and the armrest 3 is in a storage state B Consists of a detachment range Y reaching a detachment position C that is slightly backward,
The normal range X and the detachable range Y have a shape connected by a narrow portion 21 having a small width.

The width d ₁ of the groove 13 in the normal range X is:
The diameter of the first step portion 7 of the moving pin 5 is set to be larger than the middle diameter D _{2 and} smaller than the large diameter D ₁ of the flange portion 6. Further, the width d ₂ of the narrow portion 21 is set smaller than the small diameter D ₃ of the second step portion 8 of the moving pin 5. Moreover, desorption range Y has a generally circular larger diameter d ₃ than diameter D ₁ of the flange portion 6.

Next, the operation of this embodiment will be described. In the normal range X from the use position A of the groove 13 to the storage position B, the armrest 3 can be freely rotated.
In the use position A and the storage position B, since the moving pin 5 is urged in the retracting direction by the coil spring 20, the flange 6 of the moving pin 5 is pressed against the edge of the groove 13 to prevent rattling. Is done.

When the flange 6 is pressed against the edge 13 a of the groove 13, the moving pin 5 can pass through the narrow portion 21 of the groove 13 because the groove 13 corresponds to the first step 7. The armrest 3 does not come off accidentally.

When the armrest 3 is to be removed, the button 9 exposed on the outside of the armrest 3 is pressed while the moving pin 5 of the armrest 3 has reached the storage position B serving as the entrance of the narrow portion 21. good. Then, the moving pin 5 moves as a whole in the protruding direction, and the small-diameter D ₃ second step portion 8 of the moving pin 5 corresponds to the narrow portion 21, so that the moving pin 5 can pass through the narrow portion 21. , Into the desorption range Y. Desorption range Y because of generally circular larger diameter d ₃ than diameter D ₁ of the flange portion 6 of the moving pin 5 as described above, can be pulled out easily move pin 5 from the desorption range Y.

In this embodiment, the other end portion of the moving pin 5 is formed to be extended, and the other end portion is provided with an integrated button portion 9.
Although the example in which the button is formed is shown, another button may be provided on the front side of the armrest 3 and may be linked to the moving pin 5 via the urging means.

[0024]

According to the first aspect of the present invention, since there is no need to provide a lock mechanism on the seatback side for engaging with the shaft pin of the armrest, the manufacture of the seatback is simplified. Also, during normal use, the armrest's moving pin cannot pass through the narrow part of the groove, so the armrest does not come out carelessly, but when the armrest's moving pin reaches the storage position that becomes the entrance of the narrow part. If you press the button,
Since the moving pin can pass through the narrow portion and the moving pin enters the detachable range, the armrest can be easily attached and detached. Further, since the urging means for pressing the moving pin in the retracting direction is provided, the armrest does not rattle in the left-right direction.

According to the second aspect of the present invention, since the button is formed at the other end of the moving pin, the number of parts can be reduced.

According to the third aspect of the present invention, since the biasing means is a coil spring provided on the movable pin, it can be installed in a narrow space in the armrest.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seat according to an embodiment of the present invention.

FIG. 2 is an enlarged view showing one end of a moving pin.

FIG. 3 is an exploded perspective view showing a detachable structure of an armrest.

FIG. 4 is a side view showing a structure of a side portion of the seat back.

FIG. 5 is a sectional view taken along the line SA-SA shown in FIG. 3;

FIG. 6 is a sectional view taken along the line SB-SB shown in FIG. 4;

[Explanation of symbols]

 Reference Signs List 2 seat back 3 armrest 4 axis pin 5 moving pin 6 flange 7 first step 8 second step 9 button 12 shaft hole 13 groove 20 coil spring (biasing means) 21 narrow part A use position B storage position C Desorption position X Normal range Y Desorption range

Claims (3)

[Claims] 1. A fixed shaft pin and a movable pin that can move up and down are erected on an inner side surface of a base end portion of an armrest, and a shaft hole for inserting the shaft pin into a side portion of a seat back and an arc around the shaft pin A groove for inserting the moving pin that moves along a locus is formed. The normal range and the detachable range are connected by a narrow portion, and one end of the moving pin prevents the groove from coming off in the normal range and detaches. A flange portion having a dimension that allows escape in a range, a first step portion formed at a base side of the flange portion and having a dimension that can move in a normal range and cannot move a narrow portion, Formed at the base of the step And a second step portion having a dimension capable of moving the narrow portion by being moved, and a biasing means for pressing the moving pin in the retracting direction is provided, and a button portion for pressing the moving pin in the projecting direction is provided on the armrest. An armrest detachable structure provided on an outer surface of a base end portion. 2. The detachable structure of an armrest according to claim 1, wherein the button is formed at the other end of a moving pin integrally extended to a base end outer surface of the armrest. Features a detachable armrest structure. 3. The detachable structure of the armrest according to claim 1, wherein the urging means is a coil spring provided on a movable pin.