JP2013240525A - Frame structure of armrest in seat back - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame structure of an armrest in a seat back with excellent operability.SOLUTION: A frame structure of an armrest 1 can extend and contract the armrest 1 to a contracted state in which the armrest has a length enabling it to be stored inside a recessed part and an extended state in which the armrest is longer than the contracted state, and includes a guide means (spring 4, strip-like body 7, interference part 11) for putting the armrest 1 into a stored state in a raised attitude and putting the armrest 1 into the extended state in a projecting attitude.

Description

  The present invention relates to a frame structure of an armrest in a seat back of an automobile.

  2. Description of the Related Art Conventionally, a frame structure of an armrest in a seat back is known that is housed in a recess provided in a seat back and rotated forward when used (Patent Document 1).

JP 2002-306275 A

  However, in the frame structure of the armrest in the conventional seat back, since the headrest that affects the seatback recess is provided at the upper part of the seatback, in order to store the armrest in the seatback recess, In order to avoid interference, it is necessary to shorten the total length, and it is difficult to ensure a sufficient length during use.

  In addition, if the armrest has a sufficient length during use, the headrest must be lifted once in order to avoid interference with the headrest during storage. It was inconvenient.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a frame structure of an armrest in a seat back with good operability while solving the above-mentioned conventional problems.

Of the present invention, the invention described in claim 1 is the armrest between the standing posture housed in the concave portion and the protruding posture protruding forward from the concave portion in the concave portion formed in the seat back. A frame structure that is rotatably mounted,
The armrest can be expanded and contracted into a contracted state that is a length that can be stored in the recess and an extended state that is longer than the contracted state,
Guiding means for placing the armrest in the stowed state in the standing posture and bringing the armrest in the extended state in the projecting posture is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the guide unit includes a biasing unit that biases the armrest to the extended state in the projecting posture, and the attachment unit in the standing posture. And restricting means for restricting the armrest to the contracted state against the biasing means.

  According to a third aspect of the present invention, in the second aspect of the present invention, the restricting unit may be configured such that the restricting portion is located between a distal end portion where the armrest extends and contracts in the protruding posture and a position behind the rotation center of the armrest. Formed by a flexible member that is stretched on the base and an interference portion that is provided at a base end portion of the armrest and that interferes with the flexible member in the standing posture and bends the flexible member downward It is characterized by that.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the guide means is supported such that one end thereof is rotatable at a position in front of the rotation center of the armrest, and the other end is the extension / contraction of the armrest. It is a strut member that is rotatably connected to the moving tip.

  The frame structure of the armrest in the seat back according to claim 1 does not need to consider interference with the headrest when the armrest is housed in the recess, and can also ensure a sufficient length during use. is there. Moreover, since the operation | work which lifts a headrest once and accommodates an armrest in a recessed part is unnecessary, accommodation and drawing-out of an armrest are easy.

  The armrest described in claim 2 or 4 can be expanded and contracted with a simple structure.

  Since the urging | biasing force is stable, the armrest described in Claim 3 performs the expansion / contraction operation | movement of an armrest stably.

It is a front view of a seat back and an armrest. It is explanatory drawing which shows the standing posture which the armrest contracted. It is explanatory drawing which shows the protrusion attitude | position which the armrest extended. It is explanatory drawing which shows rotation operation | movement of an armrest. It is explanatory drawing which shows the state in which the armrest was accommodated in the recessed part. It is explanatory drawing which shows the state which the armrest rotated to the seat back front and expand | extended. It is explanatory drawing which shows the standing posture which the armrest shrunk in another Example. It is explanatory drawing which shows the protrusion attitude | position which the armrest extended in another Example.

  Hereinafter, an embodiment of a frame structure of an armrest in a seat back of the present invention will be described in detail based on the drawings.

  FIG. 1 shows a seat back and an armrest from the front. FIG. 2 shows a state where the armrest is contracted (standing posture), and FIG. 3 shows a state where the armrest is extended (protruding posture). FIG. 4 shows the rotation operation of the armrest. FIG. 5 shows a state where the armrest is housed in the recess, and FIG. 6 shows a state where the armrest is rotated forward and extended.

  As shown in FIG. 1, the armrest 1 has a structure stored in a recess 31 formed in the seat back 30, and as shown in FIG. 2, the standing posture stored in the recess 31 and shown in FIG. Thus, it attaches so that it can rotate between the protrusion attitude | positions which protrude from the recessed part 31 ahead.

  Then, as shown in FIGS. 2 and 3, the armrest 1 is divided into a base end portion 3 that is rotatably connected to the seat back 30 and a front end portion 2 that is connected to the base end portion 3, As shown in FIGS. 5 and 6, the distal end portion 2 is covered with a cover 22 made of a cushion material, and the base end portion 3 is covered with a panel 23 made of a cushion material. 2 and 3, the cover 22 and the panel 23 are omitted.

Of these, the distal end portion 2 biases the armrest 1 to an extended state in a projecting posture, with a frame member 15 formed by bending a pipe into a U-shape, a pressing bar 6 provided over the left and right shafts of the frame member 15. And a spring 4 which is an urging means.
On the other hand, the base end portion 3 is a pair of left and right pedestals 19 and 19 fixed to the seat back 30, and L-shaped attached to the pedestals 19 and 19 forward (the left side in FIG. 4 is the front). Plates 16, 16, a pair of brackets 9, 9 whose base ends are rotatably connected to the plates 16, 16 by shafts 21 and connected by rods, and frame members 15 provided at the distal ends of the brackets 9. And a pressing member 8 that slidably holds the end portion of the holding member.

Among these, the holding member 8 is formed with a hole 13 and an end of the bracket 9 is inserted. The spring 4 is clamped on the axis of the frame member 15 by the pressing member 8 and the pressing bar 6. In this way, the frame member 15 is urged in the protruding direction from the bracket 9.
Further, the bracket 9 is a plate material bent into a U-shape, and is provided on the plate 16 with a stopper pin 10 provided on the outer base end surface below the shaft 21 in the standing posture shown in FIG. It is inserted into the arc-shaped elongated hole 17 formed. A torsion spring 18 is installed between the stopper pin 10 and the plate 16.

Furthermore, between the bar 5 provided at the front end of the frame member 15 and the bar 20 installed between the bases 19 and 19 at a position rearward of the armrest 1 is made of a synthetic fiber as a flexible member. The belt-like body 7 is constructed. Although the projecting position of the frame member 15 projecting and urged by the spring 4 is regulated by the strip 7, the strip 7 extends linearly in the front-rear direction in the projecting posture of the armrest 1 shown in FIG. 3. Thus, the protruding amount of the frame member 15 is maximized.
On the other hand, between the lower ends of the brackets 9, an interference part 11 formed by bending a bar material into a U shape is provided between the inner ends. In the standing posture of the armrest 1 shown in FIG. 2, the interference portion 11 interferes with the belt-like body 7, bends the belt-like body 7 downward, and pulls downward, thereby minimizing the protruding amount of the frame member 15. The band-like body 7 and the interference part 11 form a regulating means 12.

Next, the expansion / contraction operation of the armrest 1 will be described.
First, in the standing posture of the armrest 1, the interference portion 11 that protrudes downward interferes with the belt-like body 7 as described above, so that the belt-like body 7 bends downward and pulls the belt-like body 7 downward. The frame member 15 is also lowered downward against the bias of the spring 4, and the amount of protrusion is minimized. Therefore, as shown by the solid line in FIG. 4 and FIG. 5, the armrest 1 is contracted to be housed in the recessed portion 31.

When the armrest 1 is rotated in the direction indicated by the arrow in FIGS. 4 and 5 (counterclockwise direction) from here, the bent portion is separated from the belt-like body 7 as the interference portion 11 rotates backward about the shaft 21. Is released. As a result, the urging forces of the springs 4 and 4 that have been suppressed up to that time are released, and the frame member 15 that has been pulled down as shown in FIG. Slide forward by A. Therefore, the armrest 1 is in a protruding posture and is in an extended state longer than the contracted state.
At this time, the stopper pin 10 moves in the long hole 17 of the plate 16 and stops at the rear end of the long hole 17 to stop the rotation of the armrest 1. In this state, the protruding posture shown in FIGS. 3 and 6 is maintained by the reaction force of the torsion spring 18.

  When the armrest 1 is housed in the recess 31, when the armrest 1 is rotated clockwise from the protruding posture, the interference unit 11 rotates downward and interferes with the belt-like body 7, so that the belt-like body 7 is Pulled down. Thereby, when the frame member 15 slides to the insertion side to the pressing member 8 against the urging of the spring 4 and the armrest 1 is in the standing posture, the projection amount is minimized. Therefore, the armrest 1 is housed in the recess 31 without interfering with the headrest 40 as shown in FIG.

  The frame structure of the armrest 1 configured as described above allows the armrest 1 to be expanded and contracted into a contracted state in which the armrest 1 can be accommodated in the concave portion 31 and an extended state in which the armrest 1 is longer than the contracted state. When the armrest 1 is housed in the recess 31, the armrest 1 is placed in the retracted state and provided with guide means (the spring 4 and the restricting means 12) that extend the armrest 1 in the protruding position. It is not necessary to consider interference, and it is possible to ensure a sufficient length during use. Moreover, since the operation | work which lifts the headrest 40 once and accommodates the armrest 1 in the recessed part 31 is unnecessary, accommodation and drawing-out of the armrest 1 are easy.

  Further, the guide means includes a spring 4 that biases the armrest 1 to the extended state in the protruding posture, and a regulating means 12 that restricts the armrest 1 to the contracted state against the spring 4 in the standing posture. The armrest 1 can be expanded and contracted with a simple structure.

  In addition, the restricting means 12 includes a belt-like body 7 stretched between a distal end portion 2 where the armrest 1 extends and contracts in a protruding posture and a position behind the rotation center of the armrest 1, and a base end portion of the armrest 7. Since the urging force is stable due to the formation of the interference portion 11 that interferes with the belt-like body 7 in a standing posture and bends the belt-like body 7 downward, the expansion and contraction operation of the armrest 1 is stable. Done.

  The frame structure of the armrest according to the present invention is not limited to the above-described embodiment, and the shape, material, and the like of the frame member and the plate material are appropriately changed without departing from the gist of the present invention. be able to.

  For example, it is not always necessary to use the bar-shaped interference portion 11 for bending the belt-like body 7. If the belt-like body 7 is bent and pulled down in accordance with the rotation of the armrest 1, a plate-like interference portion is used. It can be changed as appropriate.

  On the other hand, as shown in FIGS. 7 and 8, the guide means is supported so that one end is rotatable between the pedestals 61 and 61 at a position ahead of the center of rotation of the armrest 1 instead of the spring and the regulating means, and the other end. Alternatively, a configuration may be adopted in which the tension member 53 is rotatably connected to a plate member 52 provided on the frame member 51 of the distal end portion 50. Reference numeral 60 denotes a base end portion.

  In this modified example, when the armrest 1 is housed in the recess 31, as shown in FIG. 7, the tension member 53 is erected upward from the support location with the bases 61 and 61. That is, since the tension member 53 stands obliquely rearward from a position farther forward than the shaft 54 that is the center of rotation, the distance between the plate member 52 and the shaft 54 becomes the shortest, and the frame member 51 is also lowered downward. Thus, the armrest 1 is in a contracted state. The strut member 53 is a plate material formed by bending both end edges in the longitudinal direction.

  When the armrest 1 is rotated from the contracted state (standing position) in the direction indicated by the arrow (counterclockwise), the tension member 53 also rotates forward from the support location accordingly. At this time, since the support portion is ahead of the position of the shaft 54, the tension member 53 is extended as it rotates, and the frame member 51 is pushed forward by the tension member 53. Therefore, as shown in FIG. 8, the distance between the plate member 52 and the shaft 54 is the longest, and the armrest 1 is in the extended state (protruding posture).

  When the armrest 1 is housed in the recessed portion 31 from the extended state, if the armrest 1 is rotated clockwise from the state shown in FIG. 8, the tension member 53 also rotates according to this and starts from the support location with the bases 61 and 61. It becomes. At this time, since the support location is in front of the shaft 54, the other end of the tension member 53 is pulled in by the distance between the rotational positions. Accordingly, the frame member 51 is also pulled in by this distance, and the contracted state (standing posture) shown in FIG. 7 is obtained. As a result, as shown in FIG. 5, the armrest 1 contracts, and the cover 22 comes into contact with the panel 23 and is housed in the recess 31.

  Further, the tension member 53, the frame members 15, 51, the plate 16, the pedestal 61, etc. may use synthetic resin or the like in addition to metal, and can be changed as appropriate. As the flexible member, a string or wire can be adopted.

  In addition, the biasing means does not necessarily need to be the spring 4 to be compressed, and may be a tensioned spring as long as it is configured to bias the armrest 1 to the extended state in the protruding posture. Is possible.

  In addition, the presser bar 6 does not need to be provided across the left and right shafts of the frame member 3, and may be configured to receive a biasing force by a biasing means on the shaft of the frame member 3, and can be changed as appropriate.

  1 .... armrest, 2 .... tip, 3 .... base end, 4 .... spring (biasing means), 5 .... bar, 6 .... presser bar, 7 .... strip, 8, ... presser Member, 9 ... Bracket, 10 ... Stopper pin, 11 ... Interference part, 12 ... Restriction means, 13 ... Hole, 15 ... Frame member, 16 ... Plate, 17 ... Long hole, 18 ... Torsion spring, 19 ... Pedestal, 20 ... Bar, 21 ... Shaft, 22 ... Cover, 23 ... Panel, 30 ... Seat back, 31 ... Recess, 40 ... Headrest, 50 ... Tip , 51 .. Frame member, 52 .. Plate material, 53 .. Strut member, 54 .. Shaft, 60 .. Base end part, 61.

Claims (4)

A frame structure in which an armrest is rotatably mounted between a standing posture housed in the concave portion and a protruding posture protruding forward from the concave portion in a concave portion formed in a seat back,
The armrest can be expanded and contracted into a contracted state that is a length that can be stored in the recess and an extended state that is longer than the contracted state,
A frame structure of an armrest in a seat back, comprising guide means for bringing the armrest into the retracted state in the standing posture and bringing the armrest into the extended state in the protruding posture.   The guide means includes urging means for urging the armrest to the extended state in the protruding posture, and restricting means for restricting the armrest to the contracted state against the urging means in the standing posture. The frame structure of the armrest in the seat back according to claim 1, characterized in that:   The restricting means is provided at a proximal end portion of the armrest, and a flexible member that is stretched between a distal end portion of the armrest that extends and contracts in the protruding posture and a position behind the rotation center of the armrest. 3. The frame structure of an armrest in a seat back according to claim 2, wherein the frame structure is formed by an interference portion that interferes with the flexible member in the standing posture and bends the flexible member downward.   The guide means is a tension member that is rotatably supported at one end in front of the rotation center of the armrest, and that the other end is rotatably connected to a distal end portion of the armrest that expands and contracts. The frame structure of the armrest in the seat back according to claim 1.

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