JP4507369B2 - Rear seat armrest device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rear seat armrest having one end portion attached to a seat back frame of a rear seat so as to be raised and lowered.
[0002]
[Prior art]
For example, as shown in FIG. 1, this type of rear seat armrest (hereinafter simply referred to as an armrest) rotatably supports one end of the armrest at a lower portion in a storage recess D formed in the center of a seat back C of the rear seat A. Then, as shown by the arrow Y, it is possible to undulate between the storage state located in the storage recess D and the use state protruding forward from the lower part thereof. A normal armrest of this type is held in its position by the frictional force between the outer surface and the inner surface of the storage recess D in the stored state. Since such an armrest has a small holding force in the stored state and is unstable, there is a problem that the armrest rotates around the center of rotation and jumps forward during sudden braking. Since this pop-up is due to the inertial force applied to the armrest, such a pop-out frequently occurs in the case of a multifunctional armrest having a large weight.
[0003]
To solve this problem, a lock device that locks the armrest in the retracted state may be provided. However, since the operability of the armrest deteriorates, an inertia lock device that automatically locks only during sudden braking is also provided. ing. According to this, it is possible to prevent the armrest from popping out due to sudden braking without deteriorating the operability of the armrest.
[0004]
[Problems to be solved by the invention]
However, the inertia lock device has a complicated structure, which increases the manufacturing cost of the armrest device. In addition, when the weight is large like a multi-functional armrest, the force applied to the inertial locking device increases, so the strength of the locking device itself and the locking device mounting part (armrest frame and its supporting bracket) is increased. There also arises the problem that it must be The object of the present invention is to solve each of these problems.
[0005]
[Means for Solving the Problems]
The rear seat armrest device according to the present invention includes a seat back pad provided on the front side of the seat back frame of the rear seat and a seat back cover covering the seat recess, and a storage recess is formed in the front center of the seat back. The armrest that is covered with a simple skin is supported by the armrest hinge provided in the lower part of the storage recess so as to be rotatable around the horizontal axis, and the armrest is located in the storage recess and is used to project forward from the lower part. In the rear seat armrest device that can be raised and lowered between states, the armrest hinge is made of a sheet metal whose plane shape is bent in a substantially U-shape, and its central portion is fixed to the seatback frame, and the armrest is located at the rear of the insert frame . transverse axis and coaxially secured to the hinge side Rotatably supported at both ends on both sides of the armrest hinge through a down and back the other side hinge pin coaxial with screwed fixing the hinge screw the insert frame, the armrest hinge between the armrest and the seat back frame A disk-shaped damper consisting of a hooked stator and a rotor connected to rotate together with the hinge pin is provided to give viscous friction resistance to the rotation of the armrest, and the pad material of the armrest around the hinge pin is cut into a circle. It is characterized in that a space for attaching the damper is provided by bringing the skin close to the outer surface of the insert frame. During sudden braking, the armrest tends to rotate suddenly around the lateral axis due to inertia, but the damper's viscous frictional resistance is extremely large, and the armrest hardly rotates. When manually moving the armrest in and out, the rotational speed is slow, and therefore the viscous frictional resistance due to the damper is reduced. Further, the armrest is rotatably supported by the armrest hinge by a hinge pin fixed to the insert frame, and the damper is disposed without a gap in a narrow space between the armrest hinge and the insert frame.
[0007]
In the invention of the preceding paragraph, the stator includes a frame disk that is hooked on an armrest hinge and a first operating disk that is integrally coupled to the frame disk and that has a plurality of first annular protrusions formed coaxially with the lateral axis. The rotor is formed with a plurality of annular protrusions that are coupled to the bosses so as to rotate together with the hinge pins and are engaged with the first annular protrusions so as to be relatively rotatable with a slight gap therebetween. It is preferable that the second working disk is formed, and a viscous fluid that provides viscous resistance is interposed between the first and second annular protrusions.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the embodiments shown in FIGS. The rear seat A to which the rear seat armrest device of this embodiment is applied is a bench type as shown in FIG. 1, and a storage recess D is formed at the center of the seat back C rising from the rear portion of the seat cushion B. One end of the armrest 20 is positioned at the lower part in the storage recess D and is supported rotatably around the horizontal axis O (see FIG. 2). The storage located in the storage recess D is indicated by an arrow Y. It can be undulated between the state and the use state protruding forward from the lower part. The rear seat armrest device of this embodiment includes an armrest 20, an armrest hinge 15 that rotatably supports the armrest 20, and a damper 40 that is provided between the members 15, 20 and provides viscous frictional resistance to the rotation of the armrest 20. Is the main component.
[0009]
As shown mainly in FIG. 2, the seat back pad 12 provided on the front side of the frame 10 (only a part of the center is shown) of the seat back C is formed by a seat back cover 11 having a peripheral portion attached to the seat back frame 10. A storage recess D is formed in the front center portion. The seat back pad 12 is a molded product such as a flexible polyurethane foam, and the seat back cover 11 has a surface layer material such as fabric or synthetic leather, a polyester fiber, and the like on the front and back surfaces of a slab material made of a flexible polyurethane foam having a thickness of several millimeters. A sheet having a three-layer structure laminated with a back base fabric is stitched together.
[0010]
The armrest hinge 15 that rotatably supports the armrest 20 is made of a sheet metal whose planar shape is bent into a substantially U shape, as shown mainly in FIG. The armrest hinge 15 is located in the lower part of the housing recess D, and its central part is fixed to the seat back frame 10 via two welded mounting bolts 16 and nuts 17, and its both side parts 15a and 15b. Extends forward along both inner side surfaces of the storage recess D. Holes for mounting the bushes 32 and 37 coaxially with the lateral axis O are formed in front portions of the side portions 15a and 15b.
[0011]
The armrest 20 is in the form of a long and narrow box with the upper side open, and a molded product of a pad material 23 made of soft polyurethane foam or the like is bonded to the outside of an insert frame 21 made of sheet metal or the like, and the outer peripheral surface thereof is a flexible skin 22 such as a fabric. Is covered by. The armrest lid 20a provided on the upper side of the armrest 20 is also formed by providing a pad material on the upper side of an insert frame made of sheet metal or the like and covering it with a flexible skin, and the armrest is provided by a hinge provided at one end on the lateral axis O side. It is attached to 20 so that opening and closing is possible. Although the armrest 20 of the illustrated embodiment is a small case whose upper opening is opened and closed by the armrest lid 20a, the armrest 20 may be closed without the small case, or various operation switches. May be provided.
[0012]
A hinge pin 30 protrudes and is fixed to one side of the rear portion of the insert frame 21 coaxially with the horizontal axis O. The hinge pin 30 includes a flange portion 30a, a square rod portion 30b, a round rod portion 30c, and a screw portion 30d that are formed integrally and coaxially in this order from one end, and each portion 30b to 30d is provided on one rear side. The flange 30a is applied to the inner surface of the insert frame 21 so as to protrude from the small hole, and is fixed by welding. A nut 36 is also welded and fixed to the inner surface of the other side of the rear side of the insert frame 21 on the horizontal axis O, and a small hole is provided. The pad material 23 around the hinge pin 30 is cut into a circular shape so as to provide a space for mounting a damper 40 to be described later so that the outer skin 22 approaches the outer surface of the insert frame 21. The pad material 23 on the opposite side is also circularly cut around the lateral axis O so that the skin 22 is brought close to the outer surface of the insert frame 21.
[0013]
Next, the damper 40 will be described mainly with reference to FIGS. The damper 40 is composed of a stator 41, a rotor 45, and a viscous fluid interposed between the two members, and is formed in a disk shape as a whole. The stator 41 includes a frame disk 42 having a central hole 42b formed by an axial flange, a shallow hat-shaped cover 43 having a hole in the center, and a first operating disk 44, and the rotor 45 has a hinge pin 30. A boss portion 46 having a square hole 46a that engages with the square rod portion 30b in an axially slidable manner, and a second operating disk 47 that is integrally formed with the boss portion 46 and projects radially. . Four first and second annular protrusions 44a and 47a, which are engaged with each other so as to be relatively rotatable with a slight gap, are provided on the side surfaces of the first and second working disks 44 and 47 that face each other. It is formed coaxially with each central axis of the central hole 42b and the square hole 46a (thus, both are coaxial with the lateral axis O). A bolt 49 protruding in parallel with the central axis of the central hole 42b is welded and fixed to a part near the outer edge of the frame disk 42 in advance.
[0014]
To assemble the damper 40, first, the rotor 45 is placed on the frame disk 42 so that the central axes of the central hole 42b and the square hole 46a coincide with each other and the second annular projections 47a face outward. A viscous fluid such as silicon oil is put between the annular protrusions 47a. Next, the first working disk 44 is placed on the second working disk 47 of the rotor 45 so that the first annular protrusion 44a and the second annular protrusion 47a are engaged with each other, and further the first working disk 44 is covered. 43. While the four circular projections 44b on the upper surface of the first working disk 44 are engaged with the four round holes 43b of the cover 43, the six notches 43a in the skirt are formed on the six outer peripheral parts of the frame disk 42. The three members 42 to 44 of the stator 41 are integrally coupled by engaging with the bent protrusion 42a and bending the bent protrusion 42a further inward. During the assembly, the inner periphery of the second working disk 47 and the frame disk 42 and the first working disk 44 are rotatably sealed by O-rings 48a and 48b, respectively. The portion and the frame disk 42 are sealed by an O-ring 48c. As a result, the damper 40 is assembled in which a viscous fluid that provides a viscous frictional resistance is sealed between the relatively rotatable stator 41 and the annular protrusions 44 a and 47 a of the rotor 45.
[0015]
When the armrest 20 is supported by the armrest hinge 15, as shown in FIG. 2, the square hole 46 a of the rotor 45 of the damper 40 is formed in advance in the square bar portion 30 b of the hinge pin 30 protruding from the rear side of the insert frame 21. Insert the fitting. The round rod portion 30c at the tip of the hinge pin 30 of the armrest 20 thus assembled is inserted into the bush 32 attached to the hole of one side portion 15a of the armrest hinge 15, and the nut 31 is screwed into the screw portion 30d. The hinge pin 30 is rotatably supported on the side portion 15a. As described above, the armrest 20 is supported reliably because the hinge pin 30 fixed coaxially with the lateral axis on the insert frame 21 is rotatably supported on the armrest hinge 15 via the bush 32. Simultaneously with this assembly, the bolt 49 of the stator 41 is inserted into a hole (not shown) formed in the side portion 15 a and is fastened and fixed to the side portion 15 a by the nut 39.
[0016]
Next, a round bar portion 35a of the hinge screw 35 is inserted into the bush 37 attached to the hole of the other side portion 15b of the armrest hinge 15 from the outside, and a nut 36 is screwed into the screw portion 35c at the tip, and the hinge 37 is hinged through the bush 37. The screw 35 is rotatably supported on the side portion 15b. Thus armrest 20, since it is supported at both ends on both sides of the rotatable armrest hinge 15 in the transverse axis O around through the hinge pin 30 and hinge screw 35, the support is that Do and more reliably. When the armrest 20 rotates with respect to the armrest hinge 15, the stator 41 and the rotor 45 rotate relative to each other to provide viscous frictional resistance. Between the armrest hinge 15 and the armrest 20, there is a stopper (not shown) that limits the rotation range of the armrest 20 between the storage state located in the storage recess D and the use state protruding forward from the lower part of the storage recess D. Is provided.
[0017]
In the rear seat armrest device of the above-described embodiment, if the braking is performed suddenly with the armrest 20 stored, the armrest 20 will suddenly rotate around the lateral axis O due to inertia and jump forward. With respect to the rotation, the viscous frictional resistance of the damper 40 is extremely large, and the time for such sudden braking is very short, so that the armrest 20 hardly rotates. Therefore, even when the weight of the armrest is large, there is no problem because the rotation angle of the armrest is slight. In this case, if the inertial force generated due to the sudden braking is increased, the rotation angle of the armrest automatically increases accordingly, thereby suppressing the increase of the inertial force. The increase in force applied to 40 and the mounting portion of damper 40 is negligible and there is no need to increase the strength of these portions.
[0018]
Further, when the armrest 20 is manually inserted and removed, the rotational speed is low, and therefore the viscous frictional resistance by the damper 40 is reduced, so that the armrest is operated with an appropriate resistance. Further, when the armrest 20 is pulled out from the housed state to some extent and released, the armrest 20 is tilted to a use state at a substantially constant speed and stopped by the viscous frictional resistance of the damper 40. As a result, the rear seat armrest device of this embodiment has a high-class feeling.
[0019]
In the above-described embodiment, the damper 40 has a disk shape and is disposed in a narrow space between the armrest hinge 15 and the insert frame 21, so there is no wasted space, and the support portion of the armrest 20 can be configured to be small. . Further, since the first working disk 44 of the stator 41 and the second working disk 47 of the rotor 45 are provided with the first annular protrusion 44a and the second annular protrusion 47a that are engaged with each other so as to be relatively rotatable, the damper 40 has a capacity that is larger than the capacity. As a result, the opposing area between the first and second annular protrusions 44a and 47a is large, and hence the viscous frictional resistance is large, so that the support portion of the armrest 20 is further miniaturized.
[0020]
In the above-described embodiment, the hinge pin 30 and the rotor 45 are connected so as to rotate together by the square bar portion 30b and the square hole 46a, but may be connected by a key and a key groove, or connected by a spline. May be. The hooking of the stator 41 with respect to the armrest hinge 15 is not limited to the bolt 49, and may be performed by a pin or other protrusion.
[0021]
【The invention's effect】
According to the present invention, since the viscous frictional resistance of the damper is extremely large during sudden braking, the rotation angle of the armrest is small even when the weight of the armrest is large, and there is no problem. In this case, if the generated inertial force is increased, the rotation angle of the armrest is automatically increased accordingly, and the increase of the inertial force is thereby suppressed, so that the damper itself and the mounting portion of the damper are attached. The increase in applied force is small and therefore there is no need to increase the strength of these parts. Further, when the armrest is manually inserted and removed, the armrest is operated with an appropriate resistance, so that a high-class armrest can be obtained. In addition, the armrest is supported on both sides of the armrest hinge rotatably by hinge pins and hinge screws fixed coaxially with the lateral axis on both sides of the insert frame , so that the support is performed reliably, and the damper is Since there is no useless space in the narrow space between the armrest hinge and the insert frame, there is no wasted space, so the support portion of the armrest including the damper can be made compact , and the armrest hinge is a single member since, Ru can reduce manufacturing costs by reducing the number of parts and mounting steps.
[0023]
In the invention of the preceding paragraph, the stator is composed of a frame disk hooked to the armrest hinge and a first operating disk integrally coupled thereto and having a plurality of first annular protrusions formed coaxially with the lateral axis. The rotor is a boss portion that is coupled to rotate together with the hinge pin, and a second working disk that is integrally coupled to the boss portion and that has a plurality of annular projections that engage with the first annular projections in a relatively rotatable manner. According to the present invention, the damper is provided with a viscous fluid between the first and second annular projections so that the damper has an opposing area between the first and second annular projections relative to the volume. Therefore, the viscous frictional resistance is large, and the support portion of the armrest can be further downsized.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a rear seat provided with an embodiment of a rear seat armrest device according to the present invention.
FIG. 2 is a partial enlarged cross-sectional view taken along line 2-2 in FIG.
FIG. 3 is an enlarged front view of a damper used in the rear seat armrest device according to the present invention.
4 is a cross-sectional view taken along line 4-4 of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Seat back frame, 11 ... Seat back cover, 12 ... Seat back pad, 15 ... Armrest hinge, 20 ... Armrest, 21 ... Insert frame, 30 ... Hinge pin, 40 ... Damper, 41 ... Stator 41, 42 ... Frame disc, 44 ... first working disk, 44a ... first annular protrusion, 45 ... rotor, 46 ... boss, 47 ... second working disk, 47a ... second annular protrusion, A ... rear seat, C ... seat back, D ... housing recess , O ... transverse axis.

Claims (2)

A seat back pad provided on the front side of the seat back frame of the rear seat and a seat back cover covering the seat back, a storage recess is formed in the center of the front side of the seat back, and an armrest is formed by covering the outside of the insert frame with a pad material and a flexible skin. The armrest hinge provided in the lower part of the storage recess supports the armrest so as to be rotatable around a horizontal axis, and can be raised and lowered between the storage state where the armrest is located in the storage recess and the usage state where the armrest protrudes forward from the lower part. In the rear seat armrest device,
The armrest hinge is fixed to the seat back frame as a sheet metal whose plane shape is bent in a substantially U shape,
The armrest through said transverse axis and coaxially secured to the hinge pin and the hinge pin coaxial with screwed fixing the hinge screws on the rear the other side of the insert frame in the rear one side of the insert frame of the armrest hinge Supports both sides rotatably on both sides ,
Between the armrest and the seat back frame, there is provided a disk-shaped damper consisting of a stator hooked to the armrest hinge and a rotor connected to rotate together with the hinge pin, thereby providing viscous friction resistance to the rotation of the armrest. Give,
The rear seat armrest device, wherein the armrest pad material around the hinge pin is cut into a circular shape to allow the outer skin to approach the outer surface of the insert frame to provide a space for mounting the damper. The stator includes a frame disk that is hooked on the armrest hinge, and a first operating disk that is integrally coupled to the frame disk and that has a plurality of first annular protrusions formed coaxially with the lateral axis. A boss portion that is coupled to rotate together with the hinge pin and a plurality of second annular projections that are integrally coupled to the boss portion and engage with each first annular projection so as to be relatively rotatable with a slight gap are formed. 2. The rear seat armrest device according to claim 1 , wherein the rear seat armrest device includes a second working disk, and a viscous fluid that provides viscous resistance is interposed between the first and second annular protrusions .

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