JP3645127B2 - Seat back armrest mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest mounting structure for a seat back, and more specifically, a seat back frame formed in a substantially quadrangular frame shape from an upper frame, both side frames, and a lower frame connecting the lower ends of both side frames. A seat back in which a pivot arm of a reclining device is fixed to the side frame, a support bracket of an armrest is fixed to the side frame, and the armrest body is rotatably supported by the support bracket. The present invention relates to an armrest mounting structure.
[0002]
[Prior art]
In general, in a second seat such as a one-box car, the seat back is tilted forward to a substantially horizontal position by a reclining device, and the back side of the seat back can be used as a table. A support bracket of the armrest is fixed to the armrest, and the armrest is rotatably provided on the support bracket so as to improve the comfort in the vehicle interior.
[0003]
The seat back frame is formed in a substantially quadrangular frame shape from an upper frame, both side frames, and a lower frame connecting the lower ends of both side frames. When an impact load is applied to the seat back, if the seat back frame is too rigid, there is a risk that the impact on the seated person will increase, and if the seat back is too weak, the seating person will not have sufficient holdability. It was.
[0004]
[Problems to be solved by the invention]
However, in the conventional seat back, the seat back can be tilted forward by the reclining device, and the pivot arm of the reclining device is fixed to the lower part of the both side frames of the seat back frame. Since the armrest support bracket is fixed to the armrest and the armrest body is rotatably supported by the support bracket, a large number of parts are attached to the both side frames and the pivoting arm. There is a problem in work such as lowering the rigidity of the seat back frame and wrong mounting position. If the strength of the lower frame is increased more than necessary, the shock absorption will deteriorate and the weight of the seat back frame will increase. In particular, the impact load on the lumbar part of the seated occupant cannot be reduced. Table lock mechanism of the reclining device by an impact load transmitted to the rotating arm of the ring device had a fear that is released. In addition, there is a possibility that the locking mechanism of the reclining device protrudes to the side portion of the seat back and deteriorates the appearance.
[0005]
The object of the present invention is that the back side of the seat back can be used as a table, the armrest can be used as required, the comfort of the vehicle interior can be improved, and the support bracket of the armrest can be simplified. It can be installed quickly, improving the shock absorption of the seat back frame, reducing the impact load on the seated person's lumbar vertebrae, and there is no possibility that the armrest or reclining device protrudes to the side of the seat back It is an object of the present invention to provide a seat back armrest mounting structure capable of improving the above.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems, and the armrest mounting structure for a seat back according to claim 1 of the present invention includes an upper frame, both side frames, and a lower frame that connects between the bottom frames of both side frames and both side frames. And a pivot arm of the reclining device is fixed to the side frame, and a support bracket of the armrest is fixed to the side frame, and the armrest is attached to the support bracket. In the seat back armrest mounting structure in which the main body is rotatably supported,
A recess is formed in the lower part of both side frames of the seat back frame, and the locking mechanism of the reclining device is housed in the recess of the side frame, and the rotation is performed at an intermediate position of the side frame above the recess of the side frame. The upper part of the moving arm is fixed, the upper part of the support bracket of the armrest is fastened together with the fixing part of the rotating arm and the side frame, and the lower part of the supporting bracket is centered on the rotating center of the rotating arm. It is characterized by being fixed.
[0007]
The armrest mounting structure for a seat back according to claim 2 of the present invention is a seat back formed in a substantially quadrangular frame shape from an upper frame, both side frames, and a lower frame connecting the lower ends of both side frames. A pivot arm of the reclining device is fixed to the side frame, and a support bracket of the armrest is fixed to the side frame side, and the armrest body is rotatably supported by the support bracket. In the seatrest armrest mounting structure,
The reclining device includes a lower arm pivotally supported by a base and a two-stage folding structure including an upper arm pivotally supported by a pivot pin and pivotally supported by the lower arm. A recess is formed in the lower part of both side frames of the back frame, and the locking mechanism of the reclining device provided in the upper arm is housed in the recess of the side frame, and the intermediate position of the side frame above the recess of the side frame. The upper part of the upper arm of the rotating arm is fixed to the upper part, the upper part of the supporting bracket of the armrest is fixed by a fixing member that fixes the upper arm of the rotating arm and the side frame, and the lower part of the supporting bracket is rotated. It is fixed to the center of rotation of the upper arm of the arm.
[0008]
According to a third aspect of the present invention, there is provided an armrest mounting structure for a seat back, wherein the seat back is formed in a substantially quadrangular frame shape from an upper frame, both side frames, and a lower frame connecting the lower ends of both side frames. A pivot arm of the reclining device is fixed to the side frame, and a support bracket of the armrest is fixed to the side frame side, and the armrest body is rotatably supported by the support bracket. In the seatrest armrest mounting structure,
The rotating arm of the reclining device has a lower arm pivotally supported by a base via a lock mechanism for adjusting the reclining, and a locking mechanism pivotally supported by the lower arm for two-stage folding. A recess formed in the lower part of both side frames of the seat back frame, and the lower part of the locking mechanism for the two-stage folding is formed in the recess of the side frame. The upper arm of the rotating arm is fixed to an intermediate position of the side frame above the concave portion of the side frame, and the upper arm of the support bracket of the armrest is connected to the upper arm and the side frame of the rotating arm. Are fixed to the fixing member that is fixed together via a spacer, and the lower part of the support bracket is attached to the upper arm of the rotating arm. Characterized in that it is fixed to the rotation center through a spacer.
[0009]
According to a fourth aspect of the present invention, there is provided an armrest mounting structure for a seat back, wherein the seat back is formed in a substantially quadrangular frame shape from an upper frame, both side frames, and a lower frame connecting the lower ends of both side frames. A pivot arm of the reclining device is fixed to the side frame, and a support bracket of the armrest is fixed to the side frame side, and the armrest body is rotatably supported by the support bracket. In the seatrest armrest mounting structure,
The rotating arm of the reclining device has a lower arm pivotally supported by a base via a lock mechanism for adjusting the reclining, and a locking mechanism pivotally supported by the lower arm for two-stage folding. A recess formed in the lower part of both side frames of the seat back frame, and the lower part of the locking mechanism for the two-stage folding is formed in the recess of the side frame. The upper part of the upper arm of the rotating arm is fixed to an intermediate position of the side frame above the concave part of the side frame, and a connection pipe is provided between the concave parts of the both side frames, and the upper arm A fitting pin that interlocks with the locking mechanism is projected, and the end of the connection pipe is fitted to the fitting pin, and the upper part of the support bracket of the armrest is in front. The lower arm of the support bracket is fixed to the center of rotation of the upper arm of the rotating arm via a spacer. It is characterized by being.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a seat back armrest mounting structure according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of a seat back frame that can be applied to an armrest mounting structure for a seat back according to the present invention. In this embodiment, the present invention is applied to a second seat such as a one-box car. However, the present invention is not limited to this, and can be applied to various vehicle seat backs.
[0011]
As shown in FIG. 1, the seat back frame 12 of the seat back 11 is formed in a substantially quadrangular frame shape from an upper frame 14, both side frames 16, 16 and a lower frame 18 connecting the lower ends of both side frames 16, 16. Has been. The upper frame 14 is formed of a pipe frame, and both ends of the upper frame 14 and both side frames 16, 16 formed of a panel frame are connected by welding or the like, and are formed in a substantially inverted U shape.
[0012]
The upper frame 14 is formed of a pipe frame having a relatively large diameter, and the lower frame 18 is formed of a member having no strength with respect to the upper frame 14. The lower frame 18 is formed at a position facing the seated person's lumbar vertebrae, and is configured such that when an impact load is applied to the lower frame 18, the lower frame 18 can absorb the impact.
[0013]
In the present embodiment, the lower frame 18 is formed from a small-diameter pipe frame. As shown in FIG. 1, a pair of right and left holder brackets 15 for headrest stays are fixed to the upper frame 14. In FIG. 1, reference numeral 17 denotes a wire frame fixed vertically and horizontally, and 20 denotes seat belt mounting brackets provided on the left and right of the lower frame 18.
[0014]
A recess 19 is formed on the outer side of the lower part of both side frames 16, 16 of the seat back frame 12. The provided lock mechanism 21A is accommodated, and the upper part of the rotating arm 23 is fixed to an intermediate position between the side frames 16 and 16 above the recesses 19 of the side frames 16 and 16, respectively. In addition, it can replace with the both-sides locking mechanism which consists of a both-side reclining apparatus, and can also be used as a one-sided locking mechanism.
[0015]
As shown in FIG. 4, the reclining device 21 has a base 22 and a rotating arm 23 pivotally supported by the base 22 via a lock mechanism 21A for adjusting the reclining. In this embodiment, the pivot arm 23 is pivotally supported by a pivot pin 29 so as to be pivotable via a lower arm 25 pivotally supported by the base and a lock mechanism 21A for two-stage folding. The upper arm 27 has a two-fold structure. In addition, the reclining device 21 includes both-side locking mechanisms, but only one of them is shown in the figure.
[0016]
The pivot arm 23 is not limited to the two-stage folding structure including the upper arm 27 pivotally supported by the pivot pin 29 so as to be pivotable to the lower arm 25, and is also limited to the shape shown in the drawing. It is not a thing.
[0017]
An inward projecting portion of a lock mechanism 21A provided in the lower part of the upper arm 27 of the reclining device 21 is accommodated in the recess 19 at the lower part of the both side frames 16, 16 of the seat back frame 12, and the both side frames 16, 16 are accommodated. Upper portions of the upper arms 27 are fixed to intermediate positions of the side frames 16 and 16 above the concave portion 19 by bolts 31 and nuts 33 as fixing members, respectively. The nut 33 is welded to the inside of the intermediate position between the side frames 16 and 16, respectively.
[0018]
As shown in FIGS. 1, 2, and 4, a connecting pipe 45 is provided between the vertical positions of the concave portions 19 of the side frames 16, 16, and a fitting pin 47 rotates on the upper arm 27. Both ends of the connecting pipe 45 are fitted to the fitting pins 47, respectively. As shown in FIGS. 4 and 5, the upper arm 27 pivotally supported by the lower arm 25 by a pivot pin 29 is provided with an operation knob 49 of the lock mechanism 21 </ b> A. A cam 51 is fixed on the top. The operation knob 49 is provided only on one side.
[0019]
A lock tooth portion 53 is formed at the upper end of the lower arm 25, and a latch 58 engaged with and disengaged by the cam 51 is supported on the upper arm 27 by a pin 59 so as to be rotatable. It is designed to be held by a spring that does not. The cam 51, the lock tooth portion 53, and the latch 58 are covered with a latch cover 55.
[0020]
The fitting pin 47 is rotatably attached to a bracket 57 fixed to the upper arm 27, and one mounting portion 57 a of the bracket 57 is fixed to the upper arm 27 by a pin 59 together with the latch cover 55. The other mounting portion 57b is fixed to the upper arm 27 on the axis of the pivot pin 29 of the lower arm 25 coaxially with one of the mounting portions of the latch cover 55.
[0021]
A link member 61 is provided on the free end side of the pin 63 on the axis of the operation knob 49, and the pin 63 is inserted into the elongated hole 69 of the link plate 67 through the bush 65. The tip 47a of the fitting pin 47 is inserted into the hole 71, and the tip 47a of the fitting pin 47 is fitted to both ends of the connecting pipe 45, respectively. A serration is formed at the tip 47a of the fitting pin 47, and the fitting pin 47, the link plate 67, and the connecting pipe 45 can be rotated together.
[0022]
Accordingly, when the operation knob 49 is rotated, the cam 51 on the operation knob 49 side is rotated, and the latched state between the latch 58 and the lock tooth portion 53 at the upper end of the lower arm 25 is released. Further, when the operation knob 49 is rotated, the other cam 51 is rotated via the connecting pipe 45, and the lock is released. That is, when the fitting pin 47 is rotated via the connecting pipe 45, the link plate 67 is rotated, and the link member 61 fitted in the elongated hole 69 of the link plate 67 is rotated. As a result, the cam 51 is rotated, the latched state between the latch 58 and the lock tooth portion 53 of the lower arm 25 is released, and the upper arm 27 can be rotated.
[0023]
Furthermore, the connecting pipe 45 is formed at a position facing the lumbar portion of the seated person like the lower frame 18, and when an impact load is applied to the connecting pipe 45, the connecting pipe 45 is deformed to absorb the impact. Then, the end of the connecting pipe 45 and the tip 47a of the fitting pin 47 are disengaged so that the fitting state is released, and the impact load is transmitted from the cam 51 to the engagement portion side of the latch 58 and the lock tooth portion 53. It is possible to prevent the lock mechanism 21A of the reclining device 21 from being released.
[0024]
As shown in FIGS. 2 and 3, a support bracket 75 of an armrest 73 is fixed to the upper arm 27 fixed to the side frame 16, and an armrest body 77 is rotatably supported by the support bracket 75. The support bracket 75 has upper and lower attachment portions 75a and 75b and a trapezoidal bulge portion 75c protruding toward the armrest body 77 at the center.
[0025]
As shown in FIG. 2, the upper mounting portion 75a of the support bracket 75 of the armrest 73 has a spacer 81 at the lower fixing portion among the fixing portions of the upper arm 27 and the side frame 16 of the rotating arm 23. A bolt 78 that is fastened together by a bolt 31 and a nut 33, which are fixing members, and the mounting portion 75b of the lower portion of the support bracket 75 also serves as a pivot pin 29 that is the pivot center of the upper arm 27 of the pivot arm 23. It is fixed by.
[0026]
The pivot pin 29 is inserted through a spacer 83. The spacer 83 is formed in a stepped cylindrical shape, and is fixed by caulking from the upper arm 27 side through the rotation center holes of the upper arm 27, the lower arm 25, and the latch cover 55. As a result, after the lock mechanism 21A is unitized, the attachment portion 75b at the lower portion of the support bracket 75 can be fixed by the bolt 78 and the nut 88 via the spacer 83, so that the assembling property can be improved.
The trapezoidal bulging portion 75c of the support bracket 75 is provided with a shaft support portion and a rotation restriction pin 85 that rotatably support the rotation shaft 79 of the armrest body 77.
[0027]
Therefore, there is no need to make a through hole for fixing the support bracket 75 in the side frame 16 or the upper arm 27 separately, and the rigidity of the upper arm 27 can be improved. The bracket 57 may be formed integrally with the latch cover 55 or may be fixed by welding or the like.
[0028]
【The invention's effect】
The above is an embodiment of the seat back armrest mounting structure according to the present invention. According to the seat back armrest mounting structure according to claim 1 of the present invention, the recesses are formed in the lower portions of both side frames of the seat back frame. The locking mechanism of the reclining device is housed in the concave portion of the side frame, and the upper part of the rotating arm is fixed to an intermediate position of the side frame above the concave portion of the side frame, thereby supporting the armrest. The upper part of the bracket is fastened together and fixed to the fixing part of the rotating arm and the side frame, and the lower part of the support bracket is fixed to the rotating center of the rotating arm. It can be used as a table, armrests can be used as needed, and the comfort in the passenger compartment can be improved, The seatrest support bracket can be attached easily and quickly, improving the shock absorption of the seat back frame and reducing the impact load on the seat lumbar vertebrae, and the armrest and reclining device project to the side of the seat back The appearance can be improved.
[0029]
According to the armrest mounting structure of the seat back according to claim 2 of the present invention, the rotating arm of the reclining device is pivotally supported by the base so as to be pivotable, and is pivotably supported by the lower arm. It has a two-stage folding structure consisting of an upper arm pivotally supported by a pin, a recess is formed in the lower part of both side frames of the seat back frame, and a locking mechanism of a reclining device provided on the upper arm is provided on the side frame. The upper part of the upper arm of the pivot arm is fixed to an intermediate position of the side frame above the concave part of the side frame, and the upper part of the support bracket of the armrest is on the side of the upper arm of the pivot arm. The lower part of the support bracket is fixed to the upper arm of the rotating arm. Since it is fixed to the center of movement, the back side of the seat back can be used as a table, the armrest can be used as necessary, the comfort of the vehicle interior can be improved, the upper arm and The armrest support bracket can be easily and quickly attached without drilling a separate through hole in the side frame, improving the shock absorption of the seat back frame and reducing the impact load on the seated lumbar part. The appearance can be improved without the possibility that the armrest or the reclining device protrudes to the side portion of the seat back.
[0030]
According to the armrest mounting structure of the seat back according to claim 3 of the present invention, the rotating arm of the reclining device includes a lower arm pivotally supported on the base via a lock mechanism for adjusting the reclining. And a two-stage folding structure comprising an upper arm pivotally supported by the lower arm and provided with a locking mechanism for two-stage folding, and recesses are formed in the lower portions of both side frames of the seat back frame. The lower part of the locking mechanism for folding in two steps is housed in the recess of the side frame, and the upper arm of the upper arm of the rotating arm is fixed to an intermediate position of the side frame above the recess of the side frame. The upper part of the support bracket of the armrest is coupled to a fixing member that fixes the upper arm and the side frame of the rotating arm via a spacer. Since the lower part of the support bracket is fixed to the pivot center of the upper arm of the pivot arm via a spacer, the back side of the seat back can be used as a table and an armrest is required. The armrest support bracket can be easily and quickly attached without drilling a separate through hole in the upper arm and the side frame. The impact absorption of the seat back frame can be improved and the impact load on the seated person's lumbar vertebra can be reduced, and the appearance can be improved without the possibility that the armrest or reclining device protrudes to the side of the seat back.
[0031]
According to the armrest mounting structure of the seat back according to claim 4 of the present invention, the rotating arm of the reclining device includes a lower arm pivotally supported by the base via a lock mechanism for adjusting the reclining. And a two-stage folding structure comprising an upper arm pivotally supported by the lower arm and provided with a locking mechanism for two-stage folding, and recesses are formed in the lower portions of both side frames of the seat back frame. The lower part of the locking mechanism for folding in two steps is housed in the recess of the side frame, and the upper arm of the upper arm of the rotating arm is fixed to an intermediate position of the side frame above the recess of the side frame. A connecting pipe is provided between the recesses of the both side frames, and a fitting pin that interlocks with the locking mechanism is provided on the upper arm, The end of the connecting pipe is fitted, and the upper part of the support bracket of the armrest is fastened together with a fixing member that fixes the upper arm and the side frame of the rotating arm together via a spacer, Since the lower part is fixed to the pivot center of the upper arm of the pivot arm via a spacer, the back side of the seat back can be used as a table, and the armrest can be used as necessary. The comfort in the passenger compartment can be improved, and the armrest support bracket can be easily and quickly attached without drilling through holes in the upper arm and side frame, improving the shock absorption of the seat back frame. The impact load on the lumbar spine of the seated person can be reduced, and the armrest and reclining device can be Possibility that projects on the side of the-back can be improved appearance without.
[0032]
According to the present invention, the back side of the seat back can be used as a table, the armrest can be used as needed, the comfort of the vehicle interior can be improved, and the support bracket for the armrest can be simplified. It can be installed quickly, improving the shock absorption of the seat back frame, reducing the impact load on the seated person's lumbar vertebrae, and there is no possibility that the armrest or reclining device protrudes to the side of the seat back It is possible to obtain a seat back armrest mounting structure capable of improving the above.
[Brief description of the drawings]
FIG. 1 is a perspective view of a seat back frame to which an armrest mounting structure for a seat back according to the present invention is applied.
FIG. 2 is a side sectional view of an armrest mounting structure for a seat back according to the present invention.
FIG. 3 is a front view of an upper arm of a seat back armrest mounting structure according to the present invention.
FIG. 4 is a perspective view of a reclining device applied to an armrest mounting structure for a seat back according to the present invention.
FIG. 5 is an exploded perspective view of a locking mechanism for an upper arm applied to the armrest mounting structure for a seat back according to the present invention.
[Explanation of symbols]
11 Seat back 12 Seat back frame 14 Upper frame 16 Side frame 17 Wire frame 18 Lower frame 19 Recess 20 Seat belt mounting bracket 21 Reclining device 22 Base 23 Rotating arm 25 Lower arm 27 Upper arm 29 Pivoting pin 31 Bolt 33 Nut 45 Connection pipe 47 Fitting pin 49 Operation knob 51 Cam 53 Lock tooth portion 57 Bracket 58 Latch 59 Pin 61 Link member 67 Link plate 73 Armrest 75 Support bracket 75a Mounting portion 75b Mounting portion 75c Swelling portion 77 Armrest body 78 Bolt 79 times Moving shaft 81 Spacer 83 Spacer 85 Rotation restriction pin

Claims (4)

A seat back frame formed in a substantially quadrangular frame shape from an upper frame and both side frames and a lower frame connecting the lower ends of both side frames, and a rotating arm of a reclining device is fixed to the side frame; In addition, in the armrest mounting structure of the seat back, the support bracket of the armrest is fixed to the side frame side, and the armrest body is rotatably supported by the support bracket.
A recess is formed in the lower part of both side frames of the seat back frame, and the locking mechanism of the reclining device is housed in the recess of the side frame, and the rotation is performed at an intermediate position of the side frame above the recess of the side frame. The upper part of the moving arm is fixed, the upper part of the support bracket of the armrest is fastened together with the fixing part of the rotating arm and the side frame, and the lower part of the supporting bracket is centered on the rotating center of the rotating arm. A seat back armrest mounting structure characterized by being fixed. A seat back frame formed in a substantially quadrangular frame shape from an upper frame and both side frames and a lower frame connecting the lower ends of both side frames, and a rotating arm of a reclining device is fixed to the side frame; In addition, in the armrest mounting structure of the seat back, the support bracket of the armrest is fixed to the side frame side, and the armrest body is rotatably supported by the support bracket.
The reclining device includes a lower arm pivotally supported by a base and a two-stage folding structure including an upper arm pivotally supported by a pivot pin and pivotally supported by the lower arm. A recess is formed in the lower part of both side frames of the back frame, and the locking mechanism of the reclining device provided in the upper arm is housed in the recess of the side frame, and the intermediate position of the side frame above the recess of the side frame. The upper part of the upper arm of the rotating arm is fixed to the upper part, the upper part of the supporting bracket of the armrest is fixed by a fixing member that fixes the upper arm of the rotating arm and the side frame, and the lower part of the supporting bracket is rotated. Attaching the seat back armrest, which is fixed to the center of rotation of the upper arm of the arm Elephants. A seat back frame formed in a substantially quadrangular frame shape from an upper frame and both side frames and a lower frame connecting the lower ends of both side frames, and a rotating arm of a reclining device is fixed to the side frame; In addition, in the armrest mounting structure of the seat back, the support bracket of the armrest is fixed to the side frame side, and the armrest body is rotatably supported by the support bracket.
The rotating arm of the reclining device has a lower arm pivotally supported by a base via a lock mechanism for adjusting the reclining, and a locking mechanism pivotally supported by the lower arm for two-stage folding. A recess formed in the lower part of both side frames of the seat back frame, and the lower part of the locking mechanism for the two-stage folding is formed in the recess of the side frame. The upper arm of the rotating arm is fixed to an intermediate position of the side frame above the concave portion of the side frame, and the upper arm of the support bracket of the armrest is connected to the upper arm and the side frame of the rotating arm. Are fixed to the fixing member that is fixed together via a spacer, and the lower part of the support bracket is attached to the upper arm of the rotating arm. Armrest attachment structure of the seat back, characterized in that it is secured to the pivot center through a spacer. A seat back frame formed in a substantially quadrangular frame shape from an upper frame and both side frames and a lower frame connecting the lower ends of both side frames, and a rotating arm of a reclining device is fixed to the side frame; In addition, in the armrest mounting structure of the seat back, the support bracket of the armrest is fixed to the side frame side, and the armrest body is rotatably supported by the support bracket.
The rotating arm of the reclining device has a lower arm pivotally supported by a base via a lock mechanism for adjusting the reclining, and a locking mechanism pivotally supported by the lower arm for two-stage folding. A recess formed in the lower part of both side frames of the seat back frame, and the lower part of the locking mechanism for the two-stage folding is formed in the recess of the side frame. The upper part of the upper arm of the rotating arm is fixed to an intermediate position of the side frame above the concave part of the side frame, and a connection pipe is provided between the concave parts of the both side frames, and the upper arm A fitting pin that interlocks with the locking mechanism is projected, and the end of the connection pipe is fitted to the fitting pin, and the upper part of the support bracket of the armrest is in front. The lower arm of the support bracket is fixed to the center of rotation of the upper arm of the rotating arm via a spacer. An armrest mounting structure for a seat back, characterized in that

Images