CROSS REFERENCE TO RELATED APPLICATIONS

This application is a U.S. national stage application of International Patent Application No. PCT/JP2018/033313 filed on Sep. 7, 2018, which claims priority to Japanese Patent Application No. 2017-188728 filed on Sep. 28, 2017, Japanese Patent Application No. 2017-189704 filed on Sep. 29, 2017, Japanese Patent Application No. 2018-054501 filed on Mar. 22, 2018, Japanese Patent Application No. 2018-054502 filed on Mar. 22, 2018, and Japanese Patent Application No. 2018-143575 filed on Jul. 31, 2018, the contents of which are incorporated herein by reference.

BACKGROUND

The present invention relates to a vehicle decorative component.

In the related art, a heating element may be provided in a decorative component of a vehicle, such as a front garnish. The heating element is provided in order to melt and remove the ice and snow collected on the design surface of the decorative component. For example, the decorative component disclosed in Patent Document 1 has a configuration as an emblem for decorating a front grille. A radio wave transparent region through which a radio wave of a radar device provided in a vehicle passes is set on the design surface of the decorative component. A heating element that generates heat by energization to raise the temperature of the base member that forms the design surface is provided in the decorative component in the conventional example.

That is, the ice and snow collected on the design surface attenuates the radio wave, and thus detection performance of the radar device provided inside the decorative component may be degraded. In view of this point, in the above-described decorative component in the related art, ice and snow in the radio wave transparent region is removed by a temperature rising action of the heating element. Thus, it is possible to ensure high radar detection performance even during snowfall or at time of a low temperature when rainwater collected on the vehicle is likely to freeze.

In the decorative component disclosed in Patent Document 1, a sheet-like heating element configured by holding a heater wire with a sheet material is used. Thus, the handling is facilitated including a step of laying the heating element on the base member.

PRIOR ART DOCUMENT

Patent Document

Patent Document 1: Japanese Laid-Open Patent Publication No. 2017-215242

SUMMARY

However, in a vehicle, reduction of manufacturing costs is promoted along with including improvement of assemblability of all components. It is not possible that the decorative component in the related art may always meet the demand level of such vehicles that evolve every day. For this reason, further improvement has been desired.

Accordingly, it is an objective of the present invention to provide a vehicle decorative component in which it is possible to easily assemble a heating element with a simple configuration.

To achieve the foregoing objective, a vehicle decorative component is provided that includes a heating element configured by stacking first and second sheet materials and interposing a heater wire that generates heat by energization between the first and second sheet materials, a base member including a laying surface for the heating element on a front surface forming a design surface, and a circuit board that includes a power source line forming a power supply path for the heating element and is fixed to a back surface of the base member. The heating element includes a main body portion fixed to the laying surface and an extending portion that includes a power source connection portion for connecting the heater wire to the power source line and extends to the back surface of the base member. The main body portion is fixed to the laying surface by fixing the second sheet material to the base member. The heater wire is exposed in the power source connection portion without stacking the second sheet material on the first sheet material.

According to the above configuration, it is possible to easily fix the main body portion of the heating element to the laying surface, in a state where the heater wire is protected by the first and second sheet materials. In this state, the extending portion wraps around from the front surface of the base member toward the back surface, and thus it is possible to face the power source connection portion, in which the heater wire is exposed, to the circuit board fixed to the back surface of the base member. In the power source connection portion, the second sheet material is not stacked. Thus, it is possible to bring the heater wire into close contact with the power source line provided on the circuit board. As a result, it is possible to easily and reliably connect the heater wire to the power source line. In particular, according to the above configuration, since the adhesion between the heater wire and the power source line is high, it is possible to easily perform soldering in a case where soldering is used for such connections. Thus, it is possible to easily assemble the heating element with a simple configuration.

In the above-described vehicle decorative component, the second sheet material is preferably an adhesive sheet having an adhesive force to the base member.

According to the above configuration, it is possible to easily and reliably fix the heating element to the base member.

In the above-described vehicle decorative component, a hole portion that extends through the first sheet material to expose the heater wire is preferably provided in the power source connection portion.

According to the above configuration, it is possible to more easily and stably connect the heater wire to the power source line.

In the above-described vehicle decorative component, the first and second sheet materials are preferably transparent sheets.

According to the above configuration, it is possible to ensure an excellent design property.

According to the present invention, it is possible to easily assemble the heating element with a simple configuration.

