Decorative body

Abstract

To increase conductivity of wiring to a conductive resin.SOLUTION: On a steering wheel, a threaded portion 30A of a tapping screw 30 penetrates through a terminal 26A of a harness 26 and a skin layer 24C of a conductive resin 24 into an inner portion 24D of the conductive resin 24. The threaded portion 30A is conductively inserted into the inner portion 24D in a state where the skin layer 24C is removed from a portion into which the threaded portion 30A penetrates. Therefore, the terminal 26A can be conductively inserted through the tapping screw 30 into the inner portion 24D having high conductivity, and the conductivity of the harness 26 to the conductive resin 24 can be improved.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a decorative body in which a decorative member decorates a steering wheel. [Background technology]

[0002] In the steering wheel described in Patent Document 1 below, a conductive member is provided on the mounting part, and the conductive member detects a passenger's contact with the mounting part.

[0003] Here, in such a steering wheel, if wiring is electrically connected to the conductive member, it is preferable to be able to improve the conductivity of the wiring to the conductive member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-203061 A Summary of the Invention [Problem to be solved by the invention]

[0005] In consideration of the above, an object of the present invention is to provide a decorative body capable of improving the conductivity of wiring to a conductive resin. [Means for solving the problem]

[0006] The decorative body of the first embodiment of the present invention comprises a decorative member that is provided on a steering wheel of a vehicle and decorates the steering wheel; a conductive resin that is provided on the decorative member and is formed by molding resin mixed with a conductive material and detects contact of an occupant with the decorative member; and a conductive portion that is provided inside the peripheral portion of the conductive resin and through which wiring is conducted when the peripheral portion of the conductive resin is removed.

[0007] The decorative body of a second aspect of the present invention is the decorative body of the first aspect of the present invention, further comprising a conductive member that is inserted into the conductive resin to remove a peripheral portion of the conductive resin and to make the wiring conductive to the conductive portion.

[0008] The decorative body of the third aspect of the present invention is a decorative body of the first or second aspect of the present invention, wherein the steering wheel is provided with a gripping portion to be gripped by an occupant and a connection portion to be connected to the gripping portion, and the wiring is conducted to the conductive portion at the connection portion between the gripping portion and the connection portion.

[0009] A decorative body according to a fourth aspect of the present invention is the decorative body according to any one of the first to third aspects of the present invention, wherein the wiring is conducted to the conductive portion against a biasing force. Effect of the Invention

[0010] In the decorative body according to the first aspect of the present invention, a decorative member is provided on a steering wheel of a vehicle, and the decorative member decorates the steering wheel. Also, a conductive resin of the decorative member is formed by molding a resin mixed with a conductive material, and the conductive resin detects a touch of an occupant with the decorative member.

[0011] Incidentally, since the conductive resin is formed by molding a resin mixed with a conductive material, the conductive material is mixed in at a low density around the periphery of the conductive resin, resulting in low conductivity.

[0012] Here, the conductive portion is provided inside the peripheral portion of the conductive resin, and the wiring is conducted to the conductive portion with the peripheral portion of the conductive resin removed, thereby improving the conductivity of the wiring to the conductive resin.

[0013] In the decorative body of the second aspect of the present invention, the conductive member is inserted into the conductive resin to remove the peripheral portion of the conductive resin and to conduct the wiring to the conductive portion. Therefore, by inserting the conductive member into the conductive resin, the peripheral portion of the conductive resin can be removed and the wiring can be conducted to the conductive portion, so that the wiring can be easily conducted to the conductive portion.

[0014] In the decorative body of the third aspect of the present invention, a steering wheel is provided with a grip portion that is gripped by an occupant and a connection portion that is connected to the grip portion.

[0015] Here, the wiring is conducted to the conductive part at the connection part between the grip part and the connection part, so that the wiring can be easily routed to the connection part side.

[0016] In the decorative body according to the fourth aspect of the present invention, the wiring is conducted to the conductive portion against the biasing force, so that even if the conductive resin is deformed, the conduction of the wiring to the conductive portion can be maintained by the biasing force. [Brief description of the drawings]

[0017] [Figure 1] 1 is a front view showing a steering wheel according to an embodiment of the present invention, as viewed from the rear side of a vehicle. [Diagram 2] 1 is a cross-sectional view showing a conductive structure of a harness to a conductive resin in a steering wheel according to a first embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] 1 shows a front view of a steering wheel 10 as a steering wheel according to an embodiment of the present invention, seen from the rear side of the vehicle. In the drawing, the front side of the vehicle is indicated by an arrow FR, the right side of the vehicle is indicated by an arrow RH, and the upper side is indicated by an arrow UP. Furthermore, the circumferential direction of the steering wheel 10 is indicated by an arrow C, and the radially outer side of the steering wheel 10 is indicated by an arrow OUT.

[0019] The steering wheel 10 according to this embodiment faces the driver's seat of the vehicle at the rear side of the vehicle, and is disposed in front of an occupant (driver, contact person) seated in the driver's seat.

[0020] 1, a boss portion 10A serving as a supported portion is provided in the center of the steering wheel 10, and a rim portion 10B having a circular shape in a front view serving as a gripping portion is provided on the outer periphery of the steering wheel 10. Three spoke portions 10C serving as connecting portions are provided between the boss portion 10A and the rim portion 10B, and the spoke portions 10C extend from the boss portion 10A to the left side, right side, and downward of the vehicle, and are connected to the rim portion 10B.

[0021] The steering wheel 10 is provided with a metal core 12 as a framework member.

[0022] A plate-shaped boss core 12A is provided in the center of the core 12, and the boss core 12A constitutes the boss portion 10A. The boss core 12A is fixed to the vehicle rear end (upper end) of a cylindrical steering shaft 14 serving as a support portion in the vehicle, and the steering shaft 14 is disposed coaxially with the rim portion 10B. The steering wheel 10 (core 12) is supported by the steering shaft 14 so as to be integrally rotatable therewith, and when an occupant grips the rim portion 10B and rotates the steering wheel 10 in the circumferential direction, the steering shaft 14 rotates about the central axis to steer the vehicle.

[0023] A rim core metal 12B having a circular shape when viewed from the front is provided on the outer periphery of the core metal 12, and the rim core metal 12B constitutes the rim portion 10B. Three plate-shaped spoke core metals 12C are provided between the boss core metal 12A and the rim core metal 12B, and the spoke core metals 12C extend from the boss core metal 12A to the left side of the vehicle, the right side of the vehicle, and the lower side (the radial outside of the steering wheel 10) to be connected to the rim core metal 12B and to constitute the spoke portion 10C.

[0024] The boss portion 10A and the spoke portions 10C are provided with a resin, generally box-shaped cover 16 as a housing member, which is generally T-shaped when viewed from the front from the rear of the vehicle and has an interior that is open to the front of the vehicle. The cover 16 is attached to the vehicle rear side of the boss core metal 12A and the spoke core metal 12C, and the cover 16 covers the vehicle rear side of the boss core metal 12A and the portion of the spoke core metal 12C up to the vicinity of the rim portion 10B.

[0025] A covering member 18 having a circular shape as viewed from the front is provided as a fixed member on the entire rim portion 10B in the longitudinal direction (circumferential direction of the steering wheel 10) and circumferential direction (direction around the longitudinal direction), and the covering member 18 is made of soft resin (e.g., polyurethane) and has a substantially circular outer shape in a cross section perpendicular to the longitudinal direction. The rim core metal 12B is housed within the covering member 18, and the covering member 18 is fixed to the rim core metal 12B.

[0026] Approximately rectangular pillar-shaped protruding pillars 18A are integrally formed at the vehicle left end, vehicle right end, and bottom end of the covering member 18, and the protruding pillars 18A protrude radially inward of the steering wheel 10. The protruding pillars 18A accommodate the portion of the spoke core metal 12C adjacent to the rim core metal 12B, and the protruding pillars 18A are fixed to the spoke core metal 12C to form the portion of the spoke portion 10C adjacent to the rim portion 10B.

[0027] A decorative body 20 is arranged on the left and right sides of the covering member 18, except for the upper and lower ends of the covering member 18.

[0028] The decorative body 20 is provided with a long plate-like garnish 22 as a decorative member, and the garnish 22 is fixed to the inside of the rim portion 10B in the radial direction of the steering wheel 10 (the steering shaft 14 side) and to the rear side of the vehicle. The garnish 22 is curved in the longitudinal direction and the width direction, and the longitudinal direction of the garnish 22 is arranged along the longitudinal direction of the rim portion 10B, and the width direction of the garnish 22 is arranged along the circumferential direction of the rim portion 10B. The garnish 22 is fitted into a recess of the covering member 18, and the front side is flush with the circumferential surface of the covering member 18, and the garnish 22 constitutes the rim portion 10B.

[0029] A plate-shaped protruding portion 22A is integrally formed near the upper portion of the garnish 22 as a connecting portion, and the protruding portion 22A protrudes radially inward of the steering wheel 10. The protruding portions 22A on the left and right sides of the vehicle cover the rear sides of the protruding pillars 18A on the left and right sides of the vehicle, respectively, and the protruding portions 22A on the left and right sides of the vehicle constitute the portions of the spoke portions 10C on the left and right sides of the vehicle near the rim portion 10B, respectively. The tip end surface of the protruding portion 22A on the left side of the vehicle is fitted into the left end portion of the cover 16 on the vehicle, and the tip end surface of the protruding portion 22A on the right side of the vehicle is fitted into the right end portion of the cover 16 on the vehicle.

[0030] A plate-shaped protrusion 22B is integrally formed at the lower end of the garnish 22 as a connecting portion, and the protrusion 22B protrudes upward. The protrusions 22B on the left and right sides of the vehicle cover the vehicle rear side of the lower protruding pillar 18A, and the protrusions 22B on the left and right sides of the vehicle form the portion of the lower spoke portion 10C near the rim portion 10B. The right end face of the protrusion 22B on the left side of the vehicle is fitted into the left side surface of the lower end of the cover 16, and the left end face of the protrusion 22B on the right side of the vehicle is fitted into the right side surface of the lower end of the cover 16.

[0031] The front surface (vehicle rear surface) of the garnish 22 (including the protrusion 22A and the convex portion 22B) is constituted by a decorative layer 22C as a decorative portion (dielectric portion), and the decorative layer 22C has, for example, a wood grain pattern formed thereon to decorate the steering wheel 10.

[0032] The garnish 22 (including the protruding portion 22A and the convex portion 22B) is provided with a conductive resin 24 (see FIG. 2) as a detection portion on the back side of the decorative layer 22C, and the conductive resin 24 forms the end face and back side (vehicle front side) of the garnish 22. The conductive resin 24 is formed by injection molding resin 24B mixed with conductive material 24A (e.g., fibrous carbon fiber) having conductivity using a mold, and the entire peripheral portion (including the entire peripheral surface) of the conductive resin 24 has a low mixing density of the conductive material 24A, forming a skin layer 24C as a peripheral portion (low mixing portion). The conductive resin 24 has conductivity due to the conductive material 24A, and the skin layer 24C has a low conductivity due to the low mixing density of the conductive material 24A. The conductive resin 24 has an inner portion 24D, which is a conductive portion (high-mixture portion), and the conductive material 24A is mixed into the inner portion 24D at a high density to increase the conductivity. The conductive resin 24 detects the capacitance between the occupant's hand and the surface of the garnish 22 (including the protrusion 22A and the protrusion 22B), thereby making it possible to detect the contact of the occupant's hand with the garnish 22 (including the protrusion 22A and the protrusion 22B).

[0033] The conductive resin 24 is electrically connected to a control board 28 serving as a control unit at the protruding portion 22B of the garnish 22 via a harness 26 serving as wiring. The harness 26 is routed to the vehicle rear side of the spoke core metal 12C and the vehicle rear side of the boss core metal 12A, and the vehicle rear side of the harness 26 is covered by the protruding portion 22B of the garnish 22 and the cover 16. The control board 28 is fixed to the vehicle rear side of the boss core metal 12A, and the vehicle rear side of the control board 28 is covered by the cover 16.

[0034] 2, a metal plate-shaped terminal 26A is provided at one end of the harness 26 (the end on the garnish 22 side), and the terminal 26A is fixed to and electrically connected to a conductive core material 26B of the harness 26. The terminal 26A is fixed to the peripheral surface of the conductive resin 24 (the rear side surface, which is the front side surface of the vehicle, in this embodiment) by a metal tapping screw 30 serving as a conductive member. A threaded portion 30A of the tapping screw 30 is passed through the terminal 26A and is inserted and screwed into the conductive resin 24, and a head portion 30B of the tapping screw 30 holds the terminal 26A between the peripheral surface of the conductive resin 24 and the terminal 26A. The screw portion 30A penetrates the skin layer 24C of the conductive resin 24 and is inserted up to the inner portion 24D of the conductive resin 24, and when the screw portion 30A is inserted into the conductive resin 24, the screw portion 30A scrapes the skin layer 24C and the inner portion 24D to remove the skin layer 24C and to be electrically connected to the inner portion 24D. Therefore, the terminal 26A and the inner portion 24D are electrically connected via the tapping screw 30 (the head portion 30B and the screw portion 30A).

[0035] Next, the operation of this embodiment will be described.

[0036] In the steering wheel 10 configured as described above, the conductive resin 24 of the garnish 22 (including the protrusion 22A and the convex portion 22B) and the control board 28 are electrically connected via the harness 26, and the control board 28 detects the occupant's gripping of the rim portion 10B based on the fact that the capacitance between the occupant's hand and the conductive resin 24 of the garnish 22 (including the protrusion 22A and the convex portion 22B) is equal to or greater than a predetermined capacitance.

[0037] Here, the terminal 26A of the harness 26 is sandwiched between the head 30B of the tapping screw 30 and the circumferential surface of the conductive resin 24, and the threaded portion 30A of the tapping screw 30 penetrates the skin layer 24C of the conductive resin 24 and is inserted up to the inner portion 24D of the conductive resin 24. Therefore, in a state in which the skin layer 24C is removed at the penetration portion of the threaded portion 30A, the threaded portion 30A is electrically connected to the inner portion 24D. As a result, the terminal 26A of the harness 26 can be electrically connected to the inner portion 24D of the conductive resin 24, which has a high electrical conductivity (high mixing density of the conductive material 24A), via the tapping screw 30, and the amount of the conductive material 24A through which the harness 26 is electrically connected can be increased, thereby improving the electrical conductivity of the harness 26 to the conductive resin 24.

[0038] Furthermore, when the terminal 26A of the harness 26 is fixed to the conductive resin 24 by the tapping screw 30, the threaded portion 30A of the tapping screw 30 is inserted into the conductive resin 24 (skin layer 24C and inner portion 24D), so that the threaded portion 30A scrapes the skin layer 24C and the inner portion 24D, removing the skin layer 24C and establishing electrical continuity with the inner portion 24D. Therefore, by fixing the terminal 26A of the harness 26 to the conductive resin 24 (by inserting the threaded portion 30A into the conductive resin 24), the skin layer 24C can be removed and the harness 26 can be conducted to the inner portion 24D, so that the harness 26 can be easily conducted to the inner portion 24D. Moreover, there is no need to perform an operation of removing the skin layer 24C in addition to the operation of conducting the harness 26 to the inner portion 24D, and the processing cost for removing the skin layer 24C of the conductive resin 24 can be reduced.

[0039] Furthermore, a protrusion 22B of the garnish 22 is disposed at the connection between the lower spoke portion 10C and the rim portion 10B, and a terminal 26A of the harness 26 is electrically connected to the conductive resin 24 in the protrusion 22B by a tapping screw 30. Therefore, the harness 26 can be easily routed to the lower spoke portion 10C side, and can be easily routed to the control board 28 of the boss portion 10A.

[0040] In this embodiment, the terminal 26A of the harness 26 may be formed into a corrugated shape, for example, so that the terminal 26A is sandwiched between the head 30B of the tapping screw 30 and the peripheral surface of the conductive resin 24, and the terminal 26A may be elastically deformed. In this embodiment, a metal, annular elastic member (for example, a corrugated washer) may be disposed between the head 30B of the tapping screw 30 and the terminal 26A of the harness 26, so that the terminal 26A and the elastic member are sandwiched between the head 30B and the peripheral surface of the conductive resin 24, and the elastic member may be elastically deformed. In these cases, the terminal 26A is conducted to the conductive resin 24 (the inner portion 24D) against the biasing force of the terminal 26A or the elastic member. As a result, even if the conductive resin 24 is deformed due to heat or the like and the screw portion 30A of the tapping screw 30 becomes loose as it is screwed into the conductive resin 24, the conductivity of the terminal 26A to the conductive resin 24 (inner portion 24D) can be maintained by the biasing force of the terminal 26A or the elastic member.

[0041] Furthermore, in this embodiment, when the tapping screw 30 is inserted into the conductive resin 24, it removes the skin layer 24C of the conductive resin 24 and also electrically connects the harness 26 (terminal 26A) to the inner portion 24D of the conductive resin 24. However, when a pin without a thread shape is inserted into the conductive resin 24 as a conductive member, it may remove the skin layer 24C of the conductive resin 24 and also electrically connect the harness 26 (terminal 26A) to the inner portion 24D of the conductive resin 24.

[0042] Furthermore, in this embodiment, the threaded portion 30A of the tapping screw 30 removes the skin layer 24C of the conductive resin 24, so that the tapping screw 30 conducts the harness 26 (terminal 26A) to the inner portion 24D of the conductive resin 24. However, the skin layer 24C of the conductive resin 24 may be removed by post-processing instead of using the tapping screw 30 to conduct the harness 26 (terminal 26A) to the inner portion 24D of the conductive resin 24. Also, a screw hole may be formed in the conductive resin 24 by post-processing, and the harness 26 (terminal 26A) may be conducted to the inner portion 24D of the conductive resin 24 using a screw other than a tapping screw.

[0043] In this embodiment, the harness 26 (terminal 26A) is electrically connected to the inner portion 24D of the conductive resin 24 in the protruding portion 22B of the garnish 22, and the harness 26 is routed to the lower spoke portion 10C. However, the harness 26 (terminal 26A) may be electrically connected to the inner portion 24D of the conductive resin 24 in the protruding portion 22A of the garnish 22, and the harness 26 may be routed to the spoke portion 10C on the left or right side of the vehicle. [Explanation of symbols]

[0044] 10···Steering wheel (steering wheel), 10B···Rim portion (grip portion), 10C···Spoke portion (connection portion), 20···Decorative body, 22···Garnish (decorative member), 24···Conductive resin, 24A···Conductive material, 24B···Resin, 24C···Skin layer (circumferential portion), 24D···Inner portion (conductive portion), 26···Harness (wiring), 30···Tapping screw

Claims

1. A decoration member provided on a steering wheel of a vehicle and decorating the steering wheel; a conductive resin provided on the decorative member and formed by molding a resin having a conductive material mixed therein, the conductive resin detecting the touch of an occupant with the decorative member; a conductive portion that is provided inside the peripheral portion of the conductive resin and through which wiring is conducted in a state in which the peripheral portion of the conductive resin is removed; A decorative body comprising:

2. The decorative body according to claim 1 , further comprising a conductive member that is inserted into the conductive resin to remove a peripheral portion of the conductive resin and to make the wiring conductive to the conductive portion.

3. 3. The decorative body according to claim 1, wherein the steering wheel is provided with a grip portion to be gripped by an occupant and a connection portion to be connected to the grip portion, and the wiring is conducted to the conductive portion at the connection portion between the grip portion and the connection portion.

4. The decorative body according to any one of claims 1 to 3, wherein the wiring is conducted to the conductive portion against a biasing force.

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