JP7623921B2 - Vehicle lighting equipment - Google Patents

Description

The present invention relates to an in-vehicle lighting device, and in particular to the structure of a lighting device equipped with a control circuit for a light source.

In the interior of an automobile, a lighting device is attached to the ceiling. As shown in Patent Document 1, some lighting devices include a light source housed in a housing and a lens provided at an opening of the housing. The lens transmits the light emitted by the light source. Some lenses diffuse the light emitted by the light source and irradiate a wide area inside the vehicle interior.

In the lighting device (vehicle interior lighting device) described in Patent Document 1, an electrode portion is formed in the form of a thin film on the light source side of the lighting lens. The light source is turned on and off based on a change in electrostatic capacitance between the electrode portion and the human body caused by the human body touching the interior surface of the lighting lens. The light source is turned on and off by an electrical control circuit arranged on a substrate. Conduction is established between the electrode portion and the substrate by a conductive bar made of an elastic material such as conductive rubber, and the electrical control circuit and the electrode portion are electrically connected via the conductive bar.

Patent documents 2 and 3 describe, as technologies related to the present invention, a switch that is controlled in response to a change in the capacitance of an electrode due to the approach or contact of a human body. Patent document 2 describes a capacitive touch switch device in which a switch electrode provided on an operation panel section that is touched by a finger is electrically connected to a control board by an elastic conductive member. Patent document 3 describes an electronic device switch that includes an electrode protection member on which a touch surface is formed, an electrode on the side opposite to the side on which the touch surface is formed and facing the touch surface, and a board. In this electronic device switch, an elastic body with a circuit body formed on the entire surface is provided between the electrode and the board, so that the electrode and the board are electrically connected.

JP 2007-230450 A JP 2008-192336 A JP 2018-41690 A

In conventional vehicle lighting devices such as those described in Patent Document 1, it was sometimes difficult to ensure that the conductive member (conductive bar) was in contact with the electrode and the board. In such cases, for example, a structure in which a metal base supporting the conductive member was soldered to the board, or a structure in which a spring was sandwiched between the conductive member and the board, was adopted, resulting in a complex structure.

The object of the present invention is to ensure electrical continuity between a human body detection unit, such as an electrode, provided on a lens and a substrate in an in-vehicle lighting device that is operated by the approach or contact of a human body to the lens.

The present invention comprises a lens that transmits light emitted from a light source, a substrate on which a control circuit for controlling the light source is disposed, and a conductive elastic body provided between the substrate and the lens, wherein the conductive elastic body is elastically stretchable in an extension direction from the substrate to the lens, and has a portion that, when viewed along the extension direction, describes a repeating waveform that repeatedly undulates in a direction intersecting the extension direction, the portion that describes the repeating waveform has a rectangular wave-shaped portion having a rectangular wave shape, and is provided between the substrate and the lens in a state pressed against the substrate and the lens.

Desirably, the conductive elastic body has a structure at at least one of the ends on the lens side and the substrate side, such that the tip portion is elastically deflected in response to the inclination of the contact surface of the contact object.

Desirably, the conductive elastic body has a contact piece at the tip end on at least one of the lens side and the substrate side that contacts the contact surface of the contact object.

Desirably, the conductive elastic body has a flexible region that connects the contact piece and the end portion of the portion that forms the repeating waveform , and the flexible region is located at a midpoint in a direction intersecting the extension direction of each of the contact piece and the end portion of the repeating waveform .

Desirably, the conductive elastic body has a portion that, when viewed along the extension direction, forms a repeating waveform that repeatedly undulates in a direction intersecting the extension direction.

The present invention ensures electrical continuity between the human body detection section of the lens and the substrate.

1 is a diagram showing an in-vehicle lighting device according to an embodiment of the present invention as viewed from the vehicle interior side. 2 is a cross-sectional view of the in-vehicle lighting device taken along line AA. FIG. FIG. 4A and 4B are a plan view and a right side view of the conductive rubber. 1A and 1B are diagrams showing conductive rubber before and after compression. 13 is a diagram showing a conforming adhesion structure formed on the lens side of the conductive rubber. FIG. 13A and 13B are diagrams showing a conductive rubber according to a first modified example. 13A and 13B are diagrams showing a conductive rubber according to a second modified example.

The embodiments of the present invention will be described with reference to each figure. Identical components shown in multiple figures will be given the same reference numerals and their description will be omitted.

Figure 1 shows an in-vehicle lighting device 1 according to an embodiment of the present invention as viewed from the passenger compartment. The in-vehicle lighting device 1 is fixed to an area of the ceiling of the vehicle that faces diagonally upward and rearward from the windshield. The upward direction in Figure 1 corresponds to the diagonally upward and rearward direction in the vehicle, and the left-right direction corresponds to the left-right direction as seen by the passengers. However, in the explanation of Figure 1, the terms up-down-left-right and up-down-left-right refer to the top-down-left-right of the drawing.

The vehicle lighting device 1 has a structure integrated with a storage compartment, and may be incorporated into an overhead console. The surface facing the passenger compartment (the vehicle compartment side) is roughly rectangular, and the surface has a lens 14 and a lid 10 for the storage compartment. The lid 10 is located on the upper side of the vehicle compartment side. The lid 10 is the flat portion of the storage container 12 that is fitted into the housing of the vehicle lighting device 1 and that appears on the vehicle compartment side. The lid 10 may be provided with a switch for operating the vehicle lighting device 1.

The left and right vertical sides of the lid 10 are straight lines. The upper edge of the lid 10 curves from the top end of the left vertical side to the right, then curves gently upward, then curves downward to reach the top end of the right vertical side. The lower edge of the lid 10 has a shape that protrudes downward in the center. That is, the lower edge of the lid 10 extends from the bottom end of the left vertical side to the right, then curves downward and extends downward, then curves right and extends right, then curves upward and extends upward, then curves right again to reach the bottom end of the right vertical side.

The accessory container 12 can swing freely around a straight line extending left and right below the lid 10 as a central axis. By pulling the top of the lid 10 toward the passenger compartment, the opening of the accessory container 12 appears on the passenger compartment side, allowing the user to store small items such as sunglasses inside. By pushing back the top of the lid 10, the accessory container 12 is stored in the housing of the in-vehicle lighting device 1 and the opening is closed.

The lens 14 is located below the lid 10. The lens 14 is formed in a plate shape and extends from the left end to the right end of the cabin side of the vehicle-mounted lighting device 1. The left and right vertical sides of the lens 14 are straight lines. The lower edge of the lens 14 curves gently upward from the bottom end of the left vertical side to the bottom end of the right vertical side. The upper edge of the lens 14 has a concave shape corresponding to the convex shape of the lower edge of the lid 10, and the center is recessed downward. That is, the upper edge of the lens 14 extends from the top end of the left vertical side to the right, then bends downward and extends downward, bends right and extends right, then bends upward and extends upward, and bends right again to reach the top end of the right vertical side.

The lens 14 has a plate-shaped opaque portion 16 and a plate-shaped transparent portion 18 that covers the passenger compartment side of the opaque portion 16. The opaque portion 16 may be formed of an opaque plastic resin that does not transmit light. The transparent portion 18 may be formed of a plastic resin that transmits light. The transparent portion 18 may be a colored plastic resin. The opaque portion 16 has light passing areas 16a to 16d formed by openings provided in the opaque portion 16. In the example shown in FIG. 1, two approximately rectangular light passing areas 16a and 16b are arranged vertically in the left area of the opaque portion 16, i.e., to the left of the downwardly recessed area. In addition, two approximately rectangular light passing areas 16c and 16d are arranged vertically in the right area of the opaque portion 16, i.e., to the right of the downwardly recessed area.

Figure 2 shows a cross section (cross section taken along line AA) that appears when the vehicle-mounted lighting device 1 is cut along line AA in Figure 1. The direction toward the drawing surface of Figure 2 (positive z-axis direction) corresponds to the diagonally upward and rearward direction of the vehicle. The upward direction (positive x-axis direction) of Figure 2 corresponds to the direction from the ceiling toward the passenger compartment, and the rightward direction (positive y-axis direction) corresponds to the rightward direction of the vehicle.

The vehicle lighting device 1 includes a housing 26, a lens 14, a substrate 52, a light source 54, and conductive rubber 56. The housing 26 has support parts 28a to 28c extending from the ceiling side toward the vehicle interior side. The support parts 28a to 28c may be formed in a wall shape or a column shape inside the housing 26. The support part 28a extends from the end on the ceiling side toward the vehicle interior side along the x-axis direction, and extends toward the vehicle interior side while bending leftward from the positive x-axis direction. The support part 28b extends from the end on the ceiling side toward the vehicle interior side along the x-axis direction, and extends toward the vehicle interior side while bending rightward from the positive x-axis direction. The support part 28c extends from the end on the ceiling side toward the vehicle interior side along the x-axis direction.

The lens 14 is in contact with the ends of the support parts 28a and 28b on the vehicle interior side. The opaque part 16 constituting the lens 14, which is to the right of the light passing area 16b, has a shape that fits into the support part 28a and is in contact with the end of the support part 28a on the vehicle interior side.

Of the opaque portion 16 constituting the lens 14, the region to the right of the light passing region 16b extends rightward from the edge of the boundary with the light passing region 16b, curves toward the ceiling, extends in a direction bent to the right in the negative x-axis direction, then curves further toward the ceiling, and extends toward the ceiling along the x-axis. A protrusion 50 extends rightward from the section of the opaque portion 16 that extends toward the ceiling along the x-axis direction. The protrusion 50 may support a member that constitutes a small storage compartment.

The transparent portion 18 that constitutes the lens 14 covers the passenger compartment side (front surface) of the opaque portion 16 and extends into the light passing area 16b formed in the opaque portion 16, blocking the light passing area 16b. The transparent portion 18 further extends from the lens body area 20 that extends into the light passing area 16b to the back side of the left area of the opaque portion 16, and contacts the back surface of the left area of the opaque portion 16.

The transparent portion 18 extends from the lens body region 20 to the back side of the right side region of the opaque portion 16, and is in contact with the back surface of the right side region of the opaque portion 16. In other words, the back side region 22, which extends from the lens body region 20 to the left and right back sides of the opaque portion 16, is in contact with the back surfaces of the left and right opaque portions 16.

Here, a cross section of the transparent portion 18 of the lens 14 is shown along line AA, with the left rear region 22 in contact with the rear surface of the left region of the opaque portion 16, and the right rear region 22 in contact with the rear surface of the right region of the opaque portion 16. The rear region 22 of the transparent portion 18 may extend outward around the entire periphery of the lens body region 20 and contact the rear surface of the opaque portion 16.

The transparent portion 18 further has front side regions 24 on the left and right that extend from the lens body region 20 to the passenger compartment side of the opaque portion 16 and contact the passenger compartment side surface of the opaque portion 16. The left side region of the opaque portion 16 is sandwiched between the left side front side region 24 and the left side rear side region 22, and the right side region of the opaque portion 16 is sandwiched between the right side front side region 24 and the right side rear side region 22. The front side region 24 on the left side of the lens body region 20 extends to the left along the passenger compartment side surface of the opaque portion 16 and bends toward the ceiling side (the opposite side to the passenger compartment) at the left edge of the opaque portion 16. The front side region 24 on the right side of the lens body region 20 extends to the right along the passenger compartment side surface of the opaque portion 16 and bends toward the ceiling side, with the tip edge contacting the protruding portion 50.

A transparent electrode 58 is provided on the back surface of the lens body region 20 and the left and right back regions 22 as a human body detection section. The transparent electrode 58 may be a transparent thin-film conductor attached to the back surface of the lens body region 20 and the left and right back regions 22 by a method such as sputtering. The right back region 22 of the transparent section 18 is in contact with the end of the support section 28b on the vehicle cabin side via the transparent electrode 58.

The substrate 52 is in contact with the ceiling-side end of each of the support sections 28a to 28c. Between the transparent electrode 58 provided on the back surface of the transparent section 18 and the substrate 52, conductive rubber 56 formed of a conductive elastic body (conductive elastic body) is provided, providing electrical continuity between the transparent electrode 58 and the substrate 52. As described below, the conductive rubber 56 generally extends in the x-axis direction, and is elastically stretchable in the x-axis direction. The conductive rubber 56 is sandwiched between the transparent electrode 58 and the substrate 52 while being pressed in the contracting direction by the lens 14 and the substrate 52.

A light source 54 is disposed between the support portion 28a and the support portion 28b on the surface of the substrate 52 facing the vehicle interior. The light source 54 may be a light bulb, a light-emitting diode, or the like. The substrate 52 is also provided with a control circuit (not shown). The control circuit is electrically connected to the transparent electrode 58 via the pattern conductor and the conductive rubber 56 on the substrate 52. The control circuit detects a change in the capacitance of the transparent electrode 58 via the pattern conductor and the conductive rubber 56 on the substrate 52, and turns on or off the light source 54 according to the detection result. When a human body such as a user's finger approaches or touches the vehicle interior side of the lens 14, the capacitance of the transparent electrode 58 changes. The control circuit turns on the light source 54 that was turned off according to the change in capacitance. Alternatively, the control circuit turns off the light source 54 that was turned on according to the change in capacitance.

When the light source 54 is turned on, the light emitted from the light source 54 passes through the lens body region 20, illuminating the vehicle interior. The lens body region 20 may have a structure, such as diamond cutting, that diffuses the light that enters and passes through the lens body region 20. In this case, the light that passes through the lens body region 20 is diffused, and a wide area in the vehicle interior is brightly illuminated.

The structure of the conductive rubber 56 will be described in detail. Figure 3 shows a perspective view of the conductive rubber 56. Figure 4(a) shows a plan view of the conductive rubber 56 when viewed from the lens 14 side towards the substrate 52 side. Figure 4(b) shows a right side view. In the following description, the lens 14 side and the substrate 52 side will be referred to as the lens side and the substrate side, respectively.

As shown in Figures 3 and 4, the conductive rubber 56 extends from the substrate 52 toward the lens 14 as a whole. The conductive rubber 56 has a lens side contact piece 60, a rectangular wave shaped portion 62, and a substrate side contact piece 64. The conductive rubber 56 further has a flexure region 66a that connects the lens side contact piece 60 and the rectangular wave shaped portion 62, and a flexure region 66b that connects the substrate side contact piece 64 and the rectangular wave shaped portion 62.

The lens side contact piece 60 and the substrate side contact piece 64 are formed in a rectangular shape. The lens side contact piece 60 and the substrate side contact piece 64 may be formed in other polygonal or circular shapes. The lens side surface of the lens side contact piece 60 contacts the transparent electrode 58 provided on the back surface of the transparent portion 18 of the lens 14. The substrate side surface of the substrate side contact piece 64 contacts the pattern conductor provided on the substrate 52.

The rectangular wave-shaped portion 62 has a zigzag band shape extending in the x-axis direction. As shown in FIG. 3, the rectangular wave-shaped portion 62 has a rectangular wave shape (zigzag band shape extending in the x-axis direction) in which multiple U-shaped conductive rubbers 62u (C-shaped conductive rubbers) adjacent to each other in the extension direction are arranged in opposite orientations, and adjacent U-shaped conductive rubbers share a section extending in the left-right direction.

The lens side surface of the U-shaped conductive rubber 62u closest to the lens 14 (hereinafter referred to as closest to the lens) and the substrate side surface of the lens side contact piece 60 are connected by a flexure region 66a. The substrate side surface of the U-shaped conductive rubber 62u closest to the substrate 52 (hereinafter referred to as closest to the substrate) and the lens side surface of the lens side contact piece 60 are connected by a flexure region 66b.

According to this structure, the conductive rubber 56 is elastically stretchable in the extension direction (x-axis direction) from the substrate 52 toward the lens 14. FIG. 5(a) shows the conductive rubber 56 before it is compressed in the extension direction. FIG. 5(b) shows the conductive rubber 56 when it is compressed in the extension direction. As shown in FIG. 5(b), the region extending in the left-right direction bends toward the lens side or the substrate side (upper or lower side in FIG. 5). The region extending in the extension direction (up-down direction in FIG. 5) on the left side bends to bulge to the left, and the region extending in the extension direction on the right side bends to bulge to the right. This causes the conductive rubber 56 to shrink in the extension direction. At the same time, an elastic force pressed against the transparent electrode 58 is applied from the rectangular wave-shaped portion 62 to the lens side contact piece 60, and an elastic force pressed against the pattern conductor of the substrate 52 is applied from the rectangular wave-shaped portion 62 to the substrate side contact piece 64.

The lens side contact piece 60, the bending area 66a, and the U-shaped conductive rubber 62u closest to the lens form a conforming structure for the contact object. That is, if the back surface of the lens 14 and the transparent electrode 58 are not parallel to the lens side surface of the lens side contact piece 60 before deformation, the lens side contact piece 60, the bending area 66a, and the U-shaped conductive rubber 62u closest to the lens deform in the direction in which the back surface of the transparent electrode 58 spreads. Also, if the back surface of the lens 14 and the transparent electrode 58 are not flat, the lens side contact piece 60 deforms in conformity with the shape of the transparent electrode 58.

Figure 6 shows the follow-up contact structure formed on the lens side of the conductive rubber 56 as viewed from the negative z-axis direction. In the example shown in this figure, the transparent electrode 58 is inclined to the right so as to protrude toward the vehicle interior as it moves from left to right. The transparent electrode 58 is also recessed toward the vehicle interior. The bending region 66a is bent to the left, and the lens side contact piece 60 is deformed along the transparent electrode 58 and is in close contact with the transparent electrode 58. Here, an example is shown in which the transparent electrode 58 is warped from the left and right so as to protrude toward the vehicle interior as it moves from left to right, but in cases in which the transparent electrode is inclined in any direction with respect to the yz plane, the lens side contact piece 60 is in close contact with the transparent electrode 58 due to the elasticity of the bending region 66a and the lens side contact piece 60. In addition, the lens side contact piece 60 is in close contact with the transparent electrode 58 even when the transparent electrode 58 bulges toward the ceiling or has an uneven shape.

In addition, while the following adhesion structure formed on the lens side of the conductive rubber 56 is shown here, the following adhesion structure formed on the substrate side also has a similar structure to the lens side, and the substrate side adhesion piece 64 adheres to the pattern conductor of the substrate 52 even when the substrate 52 is inclined with respect to the yz plane.

FIG. 7 shows conductive rubber 56A according to a first modified example. Conductive rubber 56A has a triangular wave-shaped portion 68 as a zigzag-like folded band-shaped portion extending in the x-axis direction. Triangular wave-shaped portion 68 traces alternating straight lines that are bent to the right side of the positive x-axis direction and straight lines that are bent to the left side of the positive x-axis direction from substrate side contact piece 64 toward lens 14, and reaches lens side contact piece 60.

The linear portion of the triangular wave-shaped portion 68 closest to the lens and the lens-side adhesive piece 60 form a conforming adhesive structure, similar to the conductive rubber 56 shown in Figures 3 to 6. That is, the linear portion of the triangular wave-shaped portion 68 closest to the lens can bend left and right, and the lens-side adhesive piece 60 deforms along the transparent electrode 58 to adhere to the transparent electrode 58. The linear portion of the triangular wave-shaped portion 68 closest to the substrate and the substrate-side adhesive piece 64 form a conforming adhesive structure, similar to the conductive rubber shown in Figures 3 to 6. That is, the linear portion of the triangular wave-shaped portion 68 closest to the lens can bend left and right, and the substrate-side adhesive piece 64 deforms along the substrate 52 to adhere to the pattern conductor on the substrate 52.

Figure 8 shows conductive rubber 56B according to a second modified example. In the conductive rubber 56 shown in Figures 3 and 4, the lens side surface of the U-shaped conductive rubber 62u closest to the lens and the substrate side surface of the lens side contact piece 60 are connected by a flexure region 66a. In addition, the substrate side surface of the U-shaped conductive rubber 62u closest to the substrate and the lens side surface of the substrate side contact piece 64 are connected by a flexure region 66b.

In contrast, in the conductive rubber 56B, the lens side surface of the U-shaped conductive rubber 62u closest to the lens contacts the transparent electrode 58, and the substrate side surface of the U-shaped conductive rubber 62u closest to the substrate contacts the pattern conductor of the substrate 52.

The U-shaped conductive rubber 62u closest to the lens and the U-shaped conductive rubber 62u closest to the board form a conforming contact structure. That is, the part of the U-shaped conductive rubber 62u closest to the lens that extends in the x-axis direction can bend left and right, and the part that extends left and right on the lens side forms the lens side contact piece 60, which deforms along the transparent electrode 58 and adheres to the transparent electrode 58. The part of the U-shaped conductive rubber 62u closest to the board that extends in the x-axis direction can bend left and right, and the part that extends left and right on the board side forms the board side contact piece 64, which deforms along the board 52 and adheres to the pattern conductor.

In the above, conductive rubbers 56, 56A, and 56B are shown in which a compliant adhesion structure is formed on both the lens side and the substrate side. The compliant adhesion structure may be formed on either the lens side or the substrate side.

In this way, the conductive rubber 56, 56A or 56B (hereinafter simply referred to as conductive rubber) as a conductive elastic body has a conforming adhesion structure at least on one end on the lens side and one end on the substrate side. In the conforming adhesion structure, the tip elastically bends in response to the inclination of the contact surface of the contact object, i.e., the inclination of the surface of the transparent electrode 58 or the substrate 52.

The conductive rubber has a contact piece at the tip of at least one of the lens side and the substrate side that contacts the contact surface of the contact object. That is, when a compliant contact structure is formed on the lens side, a lens side contact piece 60 is formed on the tip on the lens side, and when a compliant contact structure is formed on the substrate side, a lens side contact piece 60 is formed on the tip on the substrate side.

When viewed along the extension direction, the conductive rubber has a rectangular wave-shaped portion 62 or a triangular wave-shaped portion 68 as a portion that draws a repeating waveform that repeatedly undulates in a direction intersecting the extension direction. The lens side contact piece 60 and the lens side end portion of the portion that draws the repeating waveform may be connected by a flexure region 66a. The board side contact piece 64 and the board side end portion of the portion that draws the repeating waveform may be connected by a flexure region 66b. Here, the end portion refers to the end and its vicinity. For example, in the rectangular wave-shaped portion 62, it is the region that extends left and right at the closest position to the lens or closest to the board. In the triangular wave-shaped portion 68, it is the region that extends linearly at the closest position to the lens or closest to the board. The portion that draws the repeating waveform may be a portion that draws other periodic waveforms in addition to a rectangular wave or a triangular wave.

According to this structure, the contact piece (lens side contact piece 60 or substrate side contact piece 64) is in close contact with the contact surface of the transparent electrode 58 or substrate 52. The portion that draws the repeating waveform is elastically expandable and contractible in the extension direction, and when compressed, presses the contact piece against the contact surface of the contact object. Therefore, by sandwiching the conductive rubber between the lens 14 and the substrate 52 while pressing the conductive rubber in the contracting direction, the conductive rubber and the transparent electrode 58 are in reliable contact, and the conductive rubber and the pattern conductor on the substrate 52 are in reliable contact. In addition, it is not necessarily necessary to use a metal base that supports the conductive rubber, or a spring that is sandwiched between the conductive rubber and the substrate 52, and the structure is simplified.

In the above, an embodiment has been shown in which a transparent electrode 58 is provided as a human body detection section on the back surface of the transparent section 18 of the lens 14. Depending on the structure of the lens 14, the transparent electrode 58 may not be used. In this case, the lens side contact piece 60 of conductive rubber is directly attached to the back surface of the transparent section 18 of the lens 14. When a human body approaches or touches the cabin side surface of the lens 14, the charge in the lens side contact piece 60 changes due to dielectric polarization. As a result, the same operation is performed on the vehicle lighting device 1 as when the transparent electrode 58 is provided.

Here, the structure around the light passing region 16b of the opaque portion 16 shown in FIG. 1 has been described, but the periphery of the light passing region 16a has a similar structure to the light passing region 16b. In addition, the peripheries of the light passing regions 16c and 16d have structures that are approximately symmetrical to the light passing regions 16a and 16b, respectively.

In the above, an embodiment has been shown in which the vehicle-mounted lighting device 1 is fixed to the area of the ceiling of the automobile that extends diagonally upward from the windshield to the rear. The vehicle-mounted lighting device 1 may also be fixed to other areas, such as the center of the ceiling. Furthermore, the present invention may be used in lighting devices for switch panels, in addition to lighting devices incorporated into overhead consoles.

1 Vehicle lighting device, 10 Lid portion, 12 Small item storage container, 14 Lens, 16 Opaque portion, 16a, 16b, 16c, 16d Light passing area, 18 Transparent portion, 20 Lens body area, 22 Back side area, 24 Front side area, 26 Housing, 28a, 28b, 28c Support portion, 50 Protrusion portion, 52 Substrate, 54 Light source, 56, 56A, 56B Conductive rubber, 58 Transparent electrode, 60 Lens side contact piece, 62 Rectangular wave shaped portion, 62u U-shaped conductive rubber, 64 Substrate side contact piece, 66a, 66b Deflection area, 68 Triangular wave shaped portion.

Claims (5)

A lens that transmits light emitted from a light source;
A substrate on which a control circuit for controlling the light source is disposed;
a conductive elastic body provided between the substrate and the lens,
the conductive elastic body is elastically stretchable in an extension direction from the substrate toward the lens, and has a portion that, when viewed along the extension direction, describes a repeating waveform that repeatedly undulates in a direction intersecting the extension direction;
The portion depicting the repeating waveform has a rectangular wave shape portion having a rectangular wave shape,
An in-vehicle lighting device, characterized in that the in-vehicle lighting device is provided between the substrate and the lens in a state where the substrate and the lens are pressed against each other. The vehicle-mounted lighting device according to claim 1,
The conductive elastic body is
An in-vehicle lighting device, characterized in that at least one of the end on the lens side and the end on the substrate side has a structure such that a tip portion thereof elastically flexes in response to an inclination of a contact surface of a contact object. The vehicle-mounted lighting device according to claim 1 or 2,
The conductive elastic body is
An in-vehicle lighting device, characterized in that at least one of the tip portions of the lens side and the substrate side has a contact piece that is in close contact with a contact surface of a contact object. The vehicle-mounted lighting device according to claim 3,
The conductive elastic body is
An in-vehicle lighting device characterized in that the contact piece and the end portion of the portion that forms the repeating waveform are connected by an elastically bending bending region, and the bending region is located at a midpoint in a direction intersecting the extension direction of each of the contact piece and the end portion of the repeating waveform . The vehicle-mounted lighting device according to any one of claims 1 to 3,
The conductive elastic body is
An in-vehicle lighting device, comprising: a portion that, when viewed along the extending direction, forms a repeating waveform that repeatedly undulates in a direction intersecting the extending direction.