JP2005040248A - Angle adjusting device of armrest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the angle adjusting device of an armrest time and labor, and cost of manufacture of which can be reduced. <P>SOLUTION: To a seat back frame (not shown in the figure), the base end part of a shaft body 3 horizontally extended in right and left directions is fixed via a bracket 2. To the armrest E, a cylindrical body 4 horizontally penetrating the armrest in the right and left directions is fixed. To the cylindrical body 4, the shaft body 3 is turnably and slidably fitted. The armrest E is energized to the tip side of the shaft body 3 by a coil spring 5. On the tip surface of the shaft body 3, a stopper 7 for positioning the armrest E at a using position is fixed. On the outer peripheral surface of the shaft body 3, a serration part 3b is formed. On the inner peripheral surface of the cylindrical body 4, a serration hole part 4b to which the serration part 3b is fitted when the armrest E is positioned at the using position and from which the serration part 3b escapes when the armrest E is moved to the base end side of the shaft body 3 for a prescribed distance or more from the using position is formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest angle adjustment device capable of appropriately adjusting a rotation position of an armrest for a vehicle.
[0002]
[Prior art]
In general, in an angle adjustment device for an armrest for a vehicle, a shaft body is provided horizontally in a seat back frame of a seat, and a fitting hole is provided in an armrest. The armrest can be turned in the vertical direction by fitting the shaft body in the fitting hole so as to be turned. A serration portion is formed on the outer peripheral surface of the one end portion of the shaft body. In the fitting hole of the armrest, the connecting cylinder is provided so as to be slidable and non-rotatable. A serration hole is formed on the inner peripheral surface of the connecting cylinder. The connecting cylinder is urged toward one end side of the shaft body by a coil spring provided inside the fitting hole, and is positioned at the use position during normal use of the armrest. When the connecting cylinder is in the use position, the serration hole is fitted into the serration portion of the shaft body. Accordingly, during normal use, the armrest is supported by the seat back frame so as not to rotate.
[0003]
On the other hand, an operation button is provided on the armrest, and a moving mechanism is provided between the operation button and the connecting cylinder. When the operation button is pressed, the connecting cylinder is moved from one end side of the shaft body to the other end side against the biasing force of the coil spring by the moving mechanism. As a result, the serration portion of the shaft body escapes from the serration hole portion of the connecting cylinder. Then, the armrest can be rotated with respect to the shaft body, and the armrest can be rotated to a desired position. When the operation button is released after the armrest is rotated to a desired position, the connecting cylinder is returned to the use position by the coil spring, and the serration portion is fitted into the serration hole. As a result, the armrest cannot rotate with respect to the seat back frame (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
A microfilm describing the contents of Japanese Utility Model Application No. 4-89339 (Japanese Utility Model Application No. 6-52609) (page 6, FIG. 1)
[0005]
[Problems to be solved by the invention]
The conventional armrest angle adjustment device requires an operation button, a connecting cylinder, and a moving mechanism, and has a large number of parts. For this reason, there was a problem that the labor and cost of manufacturing increased.
[0006]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems, and is provided between a seat back frame and an arm rest, and an angle adjustment device for an arm rest that connects the arm rest to the seat back frame so as to be capable of adjusting a rotational position. The shaft body is fixed substantially horizontally to one of the seat back frame and the armrest, and is fixed substantially horizontally to the other one of the seat back frame and the arm rest, and the shaft body is rotated. And a cylindrical body that is slidably fitted in the axial direction. A serration portion is formed on the outer peripheral surface of the shaft body, and an inner peripheral surface of the cylindrical body can be engaged with and disengaged from the serration portion. A serration hole that fits into the shaft, and the serration part and the serration hole are formed such that the armrest is in the axial direction of the shaft body. Positions that are fitted together to prevent relative rotation between the shaft body and the cylindrical body, and the armrest is separated from the use position in the axial direction of the shaft body by a predetermined distance or more. When they are positioned at the position, they are separated from each other to allow relative rotation between the shaft body and the cylindrical body.
In this case, the armrest angle adjusting device is configured to urge the armrest in one direction in the axial direction of the shaft body, and stop the armrest at the use position against the urging force of the urging means. It is desirable to further include stopper means for causing the above.
Further, it is desirable that a coil spring is used as the biasing means, and the coil spring is externally inserted into the shaft body.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
First, the vehicle seat A in which the armrest angle adjusting device according to the present invention is employed will be described with reference to FIG. 3. The seat A has a seat portion B and a backrest portion C. A reclining device D is provided between the rear end of the seat B (the right end in FIG. 3) and the lower end of the backrest C. By this reclining device D, the backrest part C is connected to the seat part B so as to be rotatable about a horizontal axis extending in the left-right direction (the direction orthogonal to the paper surface in FIG. 3) and to be adjustable in angle. A base end portion (right end portion in FIG. 3) of the armrest E is supported at each intermediate portion in the vertical direction of the left and right side portions of the backrest portion C (only one armrest E is shown). Each armrest E is connected to the side portion of the backrest portion C by the armrest angle adjusting device 1 according to the present invention so as to be rotatable about a horizontal axis extending in the left-right direction and to be adjustable in angle.
[0008]
The armrest angle adjustment device 1 is configured as shown in FIGS. 1 and 2. That is, brackets 2 (only one bracket 2 is shown) are fixed to both sides of the seat back frame (not shown) of the backrest C. A base end portion of the shaft body 3 is fixed to the bracket 2. The shaft body 3 has a circular cross section, is horizontally disposed with its axis line directed in the left-right direction, and extends in a direction away from the backrest portion C. The shaft body 3 includes a support portion 3a having a length of about 2/3 of the total length provided on the base end side thereof, a serration portion 3b provided at the distal end portion, and a support portion 3a and a serration portion 3b. And a small diameter portion 3c provided therebetween. The outer diameter of the support part 3a and the outer diameter of the serration part 3b are set substantially the same. Serrations are formed on the outer peripheral surface of the serration portion 3b. Here, in the present invention, the serration is not only the serration defined in the Japanese Industrial Standard, but also the splines defined in the Japanese Industrial Standard, and other protrusions and grooves extending along the longitudinal direction of the shaft body 3 are spaced at regular intervals. Are collectively referred to as being formed alternately. And the part in which either of them was formed in the outer peripheral surface is called the serration part. The outer diameter of the small diameter part 3c is set to be equal to or slightly smaller than the root diameter of the serration part 3b. The length of the small diameter portion 3c is set equal to or slightly longer than the length of the serration portion 3b.
[0009]
At the base end portion of the armrest E, a cylindrical body 4 that penetrates the base end portion horizontally in the left-right direction is fixed. The cylindrical body 4 is formed as a cylindrical body having both ends opened, and a fitting hole portion 4a and a serration hole portion 4b are formed on the inner peripheral surface thereof. The serration hole 4b has substantially the same length as the serration 3b, and extends from the outer edge of the cylindrical body 4 (the distal end side of the shaft body 2) to the inner side (the proximal end side of the shaft body 2). Is formed. The inner peripheral part of the cylindrical body 4 other than the serration hole part 4b is a fitting hole part 4a. The length of the fitting hole 4a is set shorter than the length of the support 3a, and the inner diameter of the fitting hole 4a is set to be substantially the same as the outer diameter of the support 3a. The support part 3a of the shaft body 3 is fitted in the fitting hole 4a so as to be rotatable and slidable in the axial direction.
[0010]
A coil spring (biasing means) 5 is externally attached to the support portion 3 a of the shaft body 3 located between the bracket 2 and the armrest E. Thereby, the space occupied by the coil spring 5 is reduced, and the angle adjusting device 1 is reduced in size. One end of the coil spring 5 abuts against the bracket 2 and the other end abuts against the armrest E, thereby urging the armrest E from the proximal end side of the shaft body 3 toward the distal end side. A cylindrical cover 6 is provided outside the coil spring 5. One end of the cover 6 is fixed to the surface of the bracket 2 facing the armrest E, and the other end is fixed to the surface of the armrest E facing the bracket 2. As a result, the shaft body 3 and the coil spring 5 between the bracket 2 and the armrest E are covered with the cover 6 so that they cannot be seen from the outside. Thereby, the aesthetics of the sheet A are improved. Moreover, the cover 6 is formed in a bellows shape so that it can be expanded and contracted in the longitudinal direction of the shaft body 3, and when the armrest E moves in the axial direction of the shaft body 3, the cover 6 expands and contracts following it. It has become.
[0011]
A stopper member (stopper means) 7 having a disk shape is pressed and fixed to the front end surface of the shaft body 3 by a bolt 8. When the armrest E biased by the coil spring 5 hits the stopper member 7, the armrest E can no longer move to the tip side of the shaft body 3 and stops. The position of the armrest E at this time is the use position shown in FIG. When the armrest E is located at the use position, not only the support portion 3a of the shaft body 3 is fitted into the fitting hole portion 4a of the cylindrical body 4, but the serration portion 3b is fitted into the serration hole portion 4b. Yes. When the serration portion 3b is fitted into the serration hole portion 4b, the shaft body 3 and the cylindrical body 4 are unable to rotate. As a result, the armrest E cannot rotate with respect to the backrest portion C.
[0012]
On the other hand, when the armrest E is moved by a predetermined distance toward the proximal end side of the shaft body 3 against the urging force of the coil spring 5, the serration portion 3 b of the shaft body 3 is relatively disengaged from the serration hole portion 4 b of the cylindrical body 4. And the small diameter portion 3c enters the serration hole 3b. In particular, in the angle adjusting device 1 according to this embodiment, after the serration portion 3b comes out of the serration hole portion 4b, the armrest E is removed from the shaft body 3 by the difference in length between the small diameter portion 3c and the serration hole portion 4b. When further moved to the base end side, the end surface of each tooth constituting the serration hole portion 4b on the fitting hole portion 4a side abuts on the front end surface of the support portion 3a, and the armrest E is further on the base end side of the shaft body 3 It becomes impossible to move to. Hereinafter, the position of the armrest E from when the serration portion 3b comes out of the serration hole portion 4b to when the end surface of the tooth of the serration hole portion 4b hits the front end surface of the support portion 3a is referred to as a disengagement position. When the armrest E is located at the disengagement position, the serration portion 3b comes out of the serration hole portion 4b, and the small diameter portion 3c enters the serration hole portion 4b. As a result, the armrest E can be rotated with respect to the backrest C.
[0013]
When the rotation position of the armrest E is adjusted by the angle adjusting device 1 having the above configuration, the armrest E located at the use position is moved toward the proximal end side of the shaft body 3 against the urging force of the coil spring 5. The armrest E is positioned at the disengagement position. Then, the armrest E can rotate with respect to the shaft body 3. Therefore, the armrest E is rotated to a desired position. Thereafter, when the armrest E can be moved freely while maintaining the angle, the armrest E is moved by the coil spring 5 until it abuts against the stopper member 7 and is located at the use position. Then, the serration portion 3 b of the shaft body 3 is fitted into the serration hole portion 4 b of the cylindrical body 4. As a result, the armrest E is non-rotatably connected to the backrest portion C via the shaft body 3 and the bracket 2 and is fixed at a desired rotation position. When the serration portion 3b is fitted into the serration hole portion 4b, the armrest is disengaged from a desired position by an angle corresponding to half the pitch of the serration portion 3b at the maximum. In order to make this angle as small as possible, it is desirable to reduce the pitch of the serrations 3b and the serration holes 4b.
[0014]
In the angle adjusting device 1 of the present invention, the operation button, the connecting cylinder and the moving mechanism for moving the connecting cylinder used in the conventional angle adjusting apparatus are unnecessary, and the number of parts can be reduced accordingly. it can. Therefore, the labor and cost of manufacturing can be greatly reduced.
[0015]
Next, another embodiment of the present invention shown in FIGS. 4 and 5 will be described. In addition, about this embodiment, only a different structure from said embodiment is demonstrated, the same code | symbol is attached | subjected to the same part and the description is abbreviate | omitted.
[0016]
In the armrest angle adjusting device 1 'of this embodiment, a shaft body 3' and a cylinder body 4 'are used in place of the shaft body 3 and the cylinder body 4 of the above embodiment. The shaft body 3 ′ has a small diameter portion 3 d, a serration portion 3 e, and a support portion 3 f that are sequentially formed from the proximal end side toward the distal end side. The root diameter of the serration portion 3e is larger than the outer diameter of the small diameter portion 3d. The outer diameter of the support part 3f is larger than the outer diameter (tooth tip circle diameter) of the serration part 3e. Therefore, a step surface (stopper means) 3g is formed between the serration portion 3e and the support portion 3f.
[0017]
On the other hand, a serration hole 4c is formed on the inner peripheral surface of the cylindrical body 4 at the inner end (the base end side of the shaft body 3 '). The serration hole 4c is fitted so that the serration 3e can be engaged and disengaged, and is equal to or slightly longer than the length of the serration 3d. A portion on the outer side (tip side of the shaft body 3 ′) from the serration hole 4 c on the inner peripheral surface of the cylindrical body 4 is a fitting hole 4 d. The inner diameter of the fitting hole 4d is larger than the root diameter of the serration hole 4c, and is set to be substantially the same as the outer diameter of the support 3f. The support portion 3f is slidably and rotatably fitted in the fitting hole 4d. Since the inner diameter of the fitting hole 4d is larger than the inner diameter of the serration hole 4c, a step surface (stopper means) 4e is formed between them. When the step surface 4e hits the step surface 3g of the shaft body 3 ', the armrest E biased by the coil spring 5 can no longer move to the tip side of the shaft body 3' and stops. The position of the armrest E at this time is the use position. When the armrest E is located at the use position, as shown in FIG. 4, the entire serration portion 3e is fitted into the serration hole 4c, and the outer end surface of the armrest E is substantially flush with the distal end surface of the shaft body 3 '. Located in.
[0018]
Also in the angle adjusting device 1 'of the above embodiment, the armrest E is moved from the use position shown in FIG. 4 to the proximal end side of the shaft body 3' against the urging force of the coil spring 5, as shown in FIG. Then, the serration portion 3e is detached from the serration hole 4d. In this case, similarly to the above-described embodiment, stopper means for preventing the armrest E from moving beyond the separation position where the serration portion 3e is separated from the serration hole portion 4d is provided on the outer peripheral surface of the small diameter portion 3d. desirable. When the armrest E is moved to the separation position, the armrest E can be rotated. Therefore, the armrest E is rotated to a desired angular position. After that, when the armrest E can be freely moved while maintaining the angle, the armrest E is moved to the use position by the coil spring 5 and stopped, and the serration portion 3e is fitted into the serration hole 4d. To do. As a result, the armrest E is maintained at a desired angular position.
[0019]
In addition, this invention is not limited to said embodiment, It can change suitably.
For example, in the previous embodiment of the above two embodiments, the outer diameter of the serration portion 3b is the same as the outer diameter of the support portion 3a, but the outer diameter and the root diameter of the serration portion 3b are the same. May be larger than the outer diameter of the support portion 3a. In such a case, since the inner diameter of the serration hole 4b is larger than the support 3a corresponding to the serration 3b, the inner periphery of the serration hole 4b is moved when the armrest E is moved to the escape position. It is not necessary to form the small diameter portion 3c on the outer peripheral surface of the shaft body 3 corresponding to the surface. Therefore, the serration part 3b can be formed following the support part 3a.
Further, in each of the above embodiments, the shaft body 3 is provided on the seat back frame of the backrest portion C, and the cylinder body 4 is provided on the armrest E. However, the cylinder body is provided horizontally on the seat back frame, A shaft body that extends horizontally from the side surface on the inner side (backrest portion side) toward the backrest portion side may be provided, and the shaft body may be inserted into the cylinder portion.
[0020]
【The invention's effect】
As described above, according to the present invention, the number of parts of the angle adjustment device for the armrest can be greatly reduced as compared with the conventional one, and therefore the labor and cost required for manufacturing the angle adjustment device are greatly reduced. The effect that it can reduce is acquired.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view taken along the line XX of FIG. 3 showing an embodiment of the present invention in a state where an armrest is positioned at a use position.
FIG. 2 is a cross-sectional view similar to FIG. 1, showing the armrest positioned at the release position.
FIG. 3 is a side view showing an example of a vehicle seat in which the armrest angle adjustment device according to the present invention is employed.
FIG. 4 is a cross-sectional view similar to FIG. 1, showing another embodiment of the present invention.
FIG. 5 is a cross-sectional view similar to FIG. 2 of the other embodiment.
[Explanation of symbols]
E Armrest 1 Armrest angle adjustment device 1 ′ Armrest angle adjustment device 3 Shaft body 3 ′ Shaft body 3b Serration portion 3e Serration portion 3g Step surface (stopper means)
4 cylinder 4b serration hole 4c serration hole 4e step surface (stopper means)
5 Coil spring (biasing means)
7 Stopper member (stopper means)

Claims (3)

In an angle adjustment device for an armrest, which is provided between a seatback frame and an armrest, and connects the armrest to the seatback frame so that the rotational position can be adjusted.
A shaft body fixed substantially horizontally to one of the seat back frame and the arm rest, and a shaft body fixed substantially horizontally to the other of the seat back frame and the arm rest so that the shaft body can rotate. And a cylindrical body slidably fitted in the axial direction. A serration portion is formed on the outer peripheral surface of the shaft body, and an inner peripheral surface of the cylindrical body is detachably fitted to the serration portion. A serration hole portion is formed, and the serration portion and the serration hole portion are fitted to each other when the armrest is located at a predetermined use position in the axial direction of the shaft body, and the shaft body and the cylinder body When the armrest is located at a position more than a predetermined distance from the use position in the axial direction of the shaft body, the armrest is separated from the shaft body. Angle adjusting device of the armrest, characterized in that to permit relative rotation between the serial cylinder. Urging means for urging the armrest in one direction in the axial direction of the shaft body; and stopper means for stopping the armrest at the use position against the urging force of the urging means. The angle adjusting device for an armrest according to claim 1, wherein the angle adjusting device is an armrest. 3. The armrest angle adjusting device according to claim 2, wherein a coil spring is used as the biasing means, and the coil spring is externally inserted into the shaft body.

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