JP2020050072A - Armrest attachment structure of vehicle door trim - Google Patents

Abstract

To prevent a head of a screw for attachment of an armrest from being removed from a fitting hole and prevent damage of a fitting seat when a downward load is applied to the armrest.SOLUTION: In a structure where a vehicle outer edge part of an armrest 20 is attached to a middle trim 10 having multiple fitting seats 11a to 11h formed with fitting holes 13a to 13h, at the fitting seat 11f, a tapping screw 30 passing through the fitting hole 13f is screwed into the armrest 20 to cause the armrest 20 to be attached. In the fitting seat 11f, an upper end part continues into a door trim body in a cantilever state and a lower end part is not restricted by the middle trim 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an improvement in a structure for attaching an armrest to a door trim of a vehicle.

The armrest is required not to be disengaged from the door trim at the time of a side collision, and to bend and deform to absorb collision energy and reduce a load applied to an occupant.
Patent Literature 1 below discloses a structure in which an outer edge portion of an armrest is mounted on a door trim main body having a plurality of mounting seat surfaces in which mounting holes are formed. Specifically, the armrest is attached by screwing a screw passing through the attachment hole in the attachment seat surface into the armrest.

JP-A-4-260816 (FIGS. 1 and 2)

  In the mounting structure described in Patent Literature 1, when the occupant puts his / her arm and a downward load is applied to the armrest in a normal state, the head of the screw comes into flat contact with the mounting seat surface of the door trim body, and Arm can be stably supported. However, when a large downward load is applied to the armrest, the screw is tilted and the head of the armrest hits the mounting seat surface. Due to the local large load caused by the one-side contact, there is a case where the head of the screw comes out of the mounting hole of the mounting seat surface or the mounting seat surface is damaged.

  As a countermeasure against a large downward load applied to the armrest, solutions such as increasing the number of screws and increasing the number of screws can be considered. However, these solutions involve an increase in the rigidity of the armrest and the door trim against the load in the vehicle width direction, so that there is a disadvantage that the collision energy at the time of a side collision cannot be favorably absorbed.

The present invention has been made in order to solve the above-mentioned problem, and has a structure in which an outer edge of an armrest is mounted on a door trim main body having a plurality of mounting seats formed with mounting holes,
In at least one of the plurality of mounting seats, a screw passing through the mounting hole is screwed into the armrest,
One of the upper and lower ends of the at least one mounting seat is connected to the door trim main body in a cantilever state, and the other of the upper and lower ends and the left and right ends are not restrained by the door trim main body. .

  According to the above configuration, when a downward load is applied to the armrest, the entire mounting seat through which the screw passes is deformed following the load, so that the head of the screw does not hit against the mounting seat. Therefore, it is possible to prevent inconvenience due to a large local load caused by the one-side contact, that is, to prevent the head of the screw from coming out of the mounting hole of the mounting seat or to damage the mounting seat.

  Preferably, the door trim main body is configured as an intermediate portion in a vertically divided door trim, and the plurality of mounting seats are arranged on a lower edge portion of the door trim main body. A slit extending to the lower edge of the door trim body is formed.

  According to the present invention, when a downward load is applied to the armrest, it is possible to prevent the head of the armrest mounting screw from coming out of the mounting hole of the door trim main body or the mounting seat from being damaged.

FIG. 1A is a perspective view of a state in which a vehicle armrest is mounted on a door trim main body by a mounting structure according to an embodiment of the present invention, as viewed from a passenger compartment side. (B) is the perspective view which looked at the state where the armrest and the door trim main body were separated from the passenger compartment side. It is a principal part expansion perspective view of the door trim shown in FIG. 1 (B). It is the figure which looked at the same door trim main body which attached the same armrest from the vehicle cabin outside. It is the principal part expansion perspective view which looked at the same door trim main body to which the same armrest was attached from the vehicle interior outside. FIG. 5 is a cross-sectional view illustrating a mounting structure of the armrest to the door trim main body, and corresponds to a cross-sectional view taken along a line VV in FIG. 3.

  Hereinafter, an armrest mounting structure for a vehicle door trim according to an embodiment of the present invention will be described with reference to the drawings. In order to facilitate understanding, FIGS. 1 to 4 show the front-rear direction of the vehicle, and FIG. 5 shows the vehicle interior side and the vehicle exterior side in the vehicle width direction.

  A door trim 1 shown in FIG. 1 is mounted on a vehicle room side of a door panel (not shown) of the vehicle. The door trim 1 includes, as main components, a middle trim 10 (door trim main body) and upper and lower trims (both not shown) attached to the upper and lower sides thereof. The middle trim 10, the upper trim, and the lower trim are all made of resin injection molded products.

  As shown in FIG. 1A, an outer edge of the armrest 20 is attached to a lower edge of the middle trim 10 on the vehicle interior side. As shown in FIGS. 1B and 3, the middle trim 10 has a plurality of (eight in this embodiment) mounting seats 11 a, 11 b, 11 c, 11 d, 11 e, for mounting the armrest 20 on the lower edge thereof. 11f, 11g, and 11h. These mounting seats 11a to 11h are formed integrally with the middle trim 10 in order in the vehicle longitudinal direction.

  As shown in FIG. 1B, each of the mounting seats 11a to 11h has a seat plate portion 12a, 12b, 12c, 12d, 12e, 12f, 12g, 12h facing in the vehicle width direction. As shown in FIG. 1B and FIG. 2, mounting holes 13a, 13b, 13c, 13d, 13e, 13f, 13g, and 13h are formed in these seat plate portions 12a to 12h, respectively. As shown in FIG. 1B, the mounting holes 13a to 13d are formed in a circular shape, and as shown in FIGS. 2 and 4, the mounting holes 13e and 13g are formed in a long oval shape in the vehicle longitudinal direction. The holes 13f and 13h are formed in a circular shape. As described later, when attaching the armrest 20 to the middle trim 10, welding fixing is applied to the mounting seats 11a to 11d, fitting is applied to the mounting seats 11e and 11g, and fitting is applied to the mounting seats 11f and 11h. Is fixed by a tapping screw. The reason for using not only welding but also a stronger tapping screw for fixing the armrest 20 and the middle trim 10 is to prevent the armrest from falling off at the time of a side collision.

The mounting seat 11f to which fixing with a tapping screw is applied will be described.
FIG. 2 is a view of the rear part of the lower edge of the middle trim 10 viewed from the passenger compartment side. FIG. 4 is a view of the rear part of the lower edge of the middle trim 10 to which the armrest 20 is attached. It is the figure seen from the outside. As shown in FIGS. 2 and 4, the mounting seat 11f integrally includes the seat plate 12f and a pair of side plate portions 14f and 15f. As shown in FIG. 4, the side plates 14f, 15f protrude outward in the vehicle width direction and extend vertically. The rear side plate portion 15f in the vehicle front-rear direction protrudes outside the vehicle compartment from the front side plate portion 14f. The seat plate 12f is supported between the end portions of the side plate portions 14f and 15f on the outside of the vehicle so as to be bridged.

  Slits 16 cut out from the lower edge of the middle trim 10 are formed in front and rear of the front and rear side plate portions 14f, 15f, respectively, and extend above the upper ends of the respective side plate portions 14f, 15f. ing. As shown in the cross-sectional view of FIG. 5, the upper end portion of the seat plate portion 12 f is bent in a stepped manner in cross section, and is integrated with the middle trim 10. That is, the upper end of the mounting seat 11f is connected to the middle trim 10 in a cantilevered state, and the lower end and the front and rear ends (left and right ends in FIG. 2) are not restrained by the middle trim 10. Therefore, the lower end of the mounting seat 11f is swingable in the vehicle width direction with the upper end as a fulcrum.

The armrest 20 will be described.
As shown in FIG. 1, the armrest 20 extends in the front-rear direction of the vehicle, and has a pull handle portion 20a formed narrow on the front side and an elbow rest portion 20b formed wide on the rear side. I have. The cross-sectional view of FIG. 5 shows a cross section of the elbow rest 20b corresponding to the line of sight V of FIG. 3, and the armrest 20 includes an armrest core 21 made of a resin injection-molded product, a cushion material 22, The skin 23 is provided. The cushion member 22 is placed on the core member 21 in the elbow rest 20b. The skin 23 covers the entire upper surface and the peripheral surface of the core material 21 and the cushion material 22.

  As shown in FIG. 3, a front pull handle portion is provided outside the cabin of the armrest core 21 corresponding to the four mounting seats 11 a, 11 b, 11 c and 11 d from the front in the vehicle front-rear direction of the middle trim 10. Three welding bosses 21p are formed on the side of the armrest 20 at intervals in the longitudinal direction of the armrest 20, and three on the side of the arm rest 20b. These welding bosses 21p have a cylindrical shape, and protrude from the outside of the cabin of the armrest core 21 toward the outside of the cabin in the vehicle width direction.

  As shown in FIG. 4, the armrest core 21 in the elbow rest 20b has an upper end corresponding to the mounting seats 11e and 11g arranged rearward in the vehicle longitudinal direction from the mounting seat 11d in the middle trim 10. Two fitting protrusions 21q are formed at an interval in the longitudinal direction of the armrest 20 outside the vehicle compartment. Each fitting protrusion 21q has a horizontal plate shape, and protrudes from the core member 21 toward the outside of the vehicle compartment in the vehicle width direction. The cross-sectional shape of each fitting convex portion 21q is a shape that can be inserted into the above-mentioned mounting seats 11e and 11g and the oblong mounting holes 13e and 13g.

  Corresponding to the mounting seats 11f and 11h arranged rearward of the mounting seat 11e in the middle trim 10, two fittings are provided on the armrest core material 21 in the elbow rest 20b on the outer edge of the upper side of the vehicle compartment. Bosses 21r are formed at intervals in the longitudinal direction of armrest 20. These fitting bosses 21r are alternately arranged in the vehicle front-rear direction with the fitting protrusions 21q. Each fitting boss 21r has a cylindrical shape in which a tapping hole 21s is formed, and protrudes from the core 21 toward the outside of the vehicle compartment in the vehicle width direction.

Next, attachment of the armrest 20 to the middle trim 10 will be described.
By bringing the armrest 20 closer to the middle trim 10 from the state of FIG. 1B, as shown in FIG. 3, the welding bosses 21p of the armrest core 21 fit into the mounting seats 11a to 11d (the mounting holes 13a to 13d). As shown in FIG. 4, the fitting projections 21q fit into the mounting seats 11e and 11g (mounting holes 13e and 13g), and the fitting bosses 21r fit into the mounting seats 11f and 11h (mounting holes 13f and 13h). .

  Each of the welding bosses 21p is fixed to the mounting seats 11a to 11d by melting the distal end thereof and welding it to the seat plate portions 12a to 12d. The fitting projections 21q are supported by the mounting seats 11e and 11g so as to be immovable in the up-down direction and the front-rear direction of the vehicle and movably in the vehicle width direction by being fitted to the mounting holes 13e and 13g.

  In a state where the respective fitting bosses 21r are fitted into the mounting holes 13f and 13h of the mounting seats 11f and 11h shown in FIG. 4, the tapping screws 30 are inserted into the tapping holes 21s of the respective fitting bosses 21r as shown in FIG. By screwing, the fitting boss 21r is fixed to the mounting seats 11f and 11h. At this time, as shown in FIG. 5, the head of the tapping screw 30 has its flat surface on the vehicle interior side in surface contact with the seat plate portion 12f. The flat surface of the head of the tapping screw 30 is in surface contact with the seat plate 12h of the mounting seat 11h. The tapping screws 30, 30 are of the same type.

  In the present embodiment, when the occupant places the arm on the elbow rest 20b and a downward load is applied to the armrest 20 during normal times, the occupant's arm can be stably supported. Further, as shown in FIG. 5, when a larger downward load F is applied to the elbow rest 20b at the time of a collision or the like, as shown by the imaginary line in FIG. With the fulcrum as a fulcrum, it deforms in the vehicle exterior direction following the load F. At this time, surface contact between the flat surface of the head of the tapping screw 30 and the seat plate portion 12f is maintained, and the head of the tapping screw 30 does not hit against the seat plate portion 12f. For this reason, a large local load is not applied to the seat plate portion 12f due to the one-sided contact of the head, and the head of the tapping screw 30 is prevented from falling out of the mounting hole 13f and the mounting seat 11f is prevented from being damaged. be able to.

As a countermeasure against a large downward load applied to the armrest 20, for example, fixing the armrest using a large screw only on the mounting seat close to the point where the load acts, or increasing the number of screws for fixing the armrest However, the present embodiment has the following advantages over these cases.
Since the tapping screw 30 used for the cantilever mounting seat 11f is the same as that used for the mounting seat 11g, the number of types of components is not increased, the manufacturing cost is reduced, and the manufacturing can be simplified.
When increasing the number of screws or increasing the number of screws, the armrest and the door trim not only increase the rigidity against a downward load but also increase the rigidity against a load from the vehicle width direction. In this case, the rigidity against the load in the vehicle width direction is not increased, so that the function of absorbing the collision energy at the time of a side collision is not impaired.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be adopted without departing from the gist thereof.
In the above embodiment, the mounting seat near the elbow rest is made cantilevered and fixed with the tapping screw. However, the present invention is not limited to this, and a large downward load acts on the armrest among the mounting seats. The mounting seat near the part can be cantilevered and fixed with screws.
In the above embodiment, the upper end of the mounting seat in the cantilever state is connected to the door trim main body, but the lower end may be connected to the door trim main body.
In the above embodiment, the door trim is vertically divided into three parts: an upper trim, a middle trim, and a lower trim. The middle trim is a door trim main body, but an upper trim or a lower trim may be a door trim main body.
In the above-described embodiment, the door trim having a vertically divided structure is used. However, a door trim having a vertically divided structure of an upper trim and a lower trim may be used, or an integrated door trim may be used.

  INDUSTRIAL APPLICATION This invention is applicable to the structure which attaches an armrest to the door trim of a vehicle.

1 door trim 10 middle trim (door trim body)
11f Mounting seat 12f Seat plate 13f Mounting hole 14f, 15f Side plate 16 Slit 20 Armrest 21r Fitting boss 21s Tapping hole 30 Tapping screw

Claims (2)

In a structure in which an outer edge of an armrest is mounted on a door trim body having a plurality of mounting seats formed with mounting holes,
In at least one of the plurality of mounting seats, a screw passing through the mounting hole is screwed into the armrest,
One of the upper and lower ends of the at least one mounting seat is connected to the door trim main body in a cantilever state, and the other of the upper and lower ends and the left and right ends are not restrained by the door trim main body. Armrest mounting structure for vehicle door trim.   The door trim main body is configured as an intermediate portion in a vertically divided door trim, and the plurality of mounting seats are disposed at a lower edge of the door trim main body. The door trim main body is provided on the left and right of the at least one mounting seat. The armrest mounting structure for a vehicle door trim according to claim 1, wherein a slit extending to a lower edge of the vehicle door trim is formed.

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