JP2013033608A - Contact structure of illumination switch and indoor illumination lamp for vehicle including contact structure of illumination switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact structure of an illumination switch capable of inhibiting an increase in an installation area, and an indoor illumination lamp for vehicle including the contact structure of the illumination switch.SOLUTION: In a contact structure 1 of an illumination switch having a bus bar 50 and a conductive contact piece part 82 for conducting two contacts corresponding to operation modes of a light source 60 among a plurality of contacts formed on the bus bar 50 by a switch operation, the bus bar 50 includes an end folding part 53 having a pair of opposed plate-shaped parts 52 vertically facing each other formed by folding an end part 50a in the U-shape in a cross section, a lower bus bar part 54 formed in a lower opposed plate-shaped part 52, and an upper bus bar part 55 formed in an upper opposed plate-shaped part 52. The conductive contact piece part 82 is in a bent shape in which the conductive contact piece part 82 is bent so as to suppress vertical or horizontal expansion, and is formed with a lower contact 84 brought into contact with the lower bus bar part 54 and an upper contact 85 brought into contact with the upper bus bar part 55.

Description

The present invention relates to a lighting switch contact structure and a vehicle interior illumination lamp incorporating the lighting switch contact structure.
About.

  Conventionally, for example, a vehicle interior illumination lamp used for vehicle interior illumination has been proposed in which a plurality of light sources are provided and a plurality of light sources are selectively illuminated by a switching operation using a switch. (For example, refer to Patent Document 1).

  In the vehicle interior illumination lamp described in Patent Document 1, each of the illumination units is connected to the first conductor, three terminals connected to the first conductor, the third conductor, and the fourth conductor of the wire harness, and the first conductor. A light source electrically connected to the terminal to be connected, a first position where the terminal connected to the third conductor is electrically connected to the light source, or an electrical connection between the terminal connected to the fourth conductor and the light source. A switch capable of selecting a second position to be electrically connected to each other, wherein the mode changeover switch has two terminals connected to each of the second conductor and the fourth conductor of the wire harness, and a terminal connected to the second conductor And a switch that can select a short state in which electrical connection is established between the first conductor and the terminal connected to the fourth conductor, or an open state in which electrical connection is established between them.

Japanese Patent No. 4422064

  By the way, in such a vehicle interior illumination lamp, there is one that uses a circuit formed by punching and bending a conductive metal plate in place of a wire harness, a so-called bus bar.

  As shown in FIG. 23, the contact structure of the lighting switch using the bus bar uses a pair of conductive contact pieces 220 provided so as to widen the angle from the switch operating portion toward the end (FIG. 23 (a)). Each conductive contact piece 220 is in contact with the bus bar 210. That is, contact points 210a and 210b on the bus bar side that are in contact with the pair of conductive contact pieces 220 are provided at positions separated in the vertical direction or the horizontal direction (see FIG. 23B).

  For this reason, the vertical or horizontal dimension of the bus bar is increased, resulting in a problem that the installation area is increased.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a lighting switch contact structure capable of suppressing an increase in installation area and a vehicle interior lighting lamp incorporating the lighting switch contact structure. And

  In order to solve the above-described problems and achieve the object, a contact structure of a lighting switch according to claim 1 of the present invention is formed on a bus bar in which a circuit is formed on a conductive plate member, and formed on the bus bar. Among the plurality of contacts, in the contact structure of the lighting switch having a conductive contact piece portion that conducts two contacts according to the operation mode of the light source by switch operation, the bus bar has a U-shaped cross section at the end. Are folded into a shape to form an end folded portion having a pair of opposed plate-like portions facing each other in the vertical direction, a lower bus bar portion formed on the lower opposed plate-shaped portion, and the upper An upper bus bar portion formed on the opposing plate-like portion, and the conductive contact piece portion is bent to suppress spreading in the vertical direction or the horizontal direction, and the lower bus bar portion Bottom touched to Wherein the point, that the top contact to be contacted with the upper bus bar portion is formed.

  According to claim 2 of the present invention, in the contact structure of the lighting switch according to the above invention, the conductive contact piece portion has a substantially U-shaped bent shape, and the bent portion is surrounded by the end folded portion. It is arrange | positioned so that it may be.

  According to claim 3 of the present invention, in the contact structure of the lighting switch according to the above invention, the upper contact is in contact with the lower surface of the upper bus bar portion.

  In order to solve the above-described problems and achieve the object, a vehicle interior illumination lamp according to claim 4 of the present invention is a vehicle interior illumination lamp that performs illumination according to an operation mode of a light source by a switch operation. The lighting switch contact structure according to any one of the above is incorporated.

  The contact structure of the lighting switch according to claim 1 of the present invention is such that the end turn-up portion having a pair of opposed plate-like portions facing each other in the up-down direction when the end portion of the bus bar is folded back in a U-shape. A lower bus bar portion formed on the lower opposed plate-like portion and an upper bus bar portion formed on the upper opposed plate-like portion, wherein the conductive contact piece portion is Since the bent shape is bent so as to suppress the spread in the vertical direction or the horizontal direction, a lower contact that is in contact with the lower bus bar portion and an upper contact that is in contact with the upper bus bar portion are formed. Thus, an increase in the vertical or horizontal width of the bus bar can be suppressed, and as a result, an increase in the installation area can be suppressed.

  The contact structure of the lighting switch according to claim 2 of the present invention has the same effect as that of claim 1 described above, the conductive contact piece portion has a substantially U-shaped bent shape, and the bent portion is the Since the conductive contact piece portion is disposed so as to be surrounded by the end folded portion, the bent portion, which becomes a portion spreading in the vertical direction or the horizontal direction, can be positioned in the end folded portion. It is possible to effectively suppress an increase in the vertical or horizontal width of the bus bar.

  The contact structure of the lighting switch according to claim 3 of the present invention has the same effect as that of claim 1 described above, and the upper contact is brought into contact with the lower surface of the upper bus bar portion. The tip end portion is protected by the upper bus bar portion, and as a result, the conductive contact piece portion can be prevented from being deformed.

  Since the vehicle interior illumination lamp according to claim 4 of the present invention incorporates the contact structure of the illumination switch according to claim 1-3 described above, it is the same as the contact structure of the illumination switch according to claim 1-3 described above. The effect of can be produced.

FIG. 1 is an exploded perspective view of an illumination switch contact structure according to an embodiment of the present invention and a vehicle interior illumination lamp incorporating the illumination switch contact structure. FIG. 2 is a perspective view of the vehicle interior illumination lamp shown in FIG. 1 viewed from the indoor side. FIG. 3 is a perspective view of the vehicle interior illumination lamp shown in FIG. 1 viewed from the back side. FIG. 4 is a diagram for explaining that the end portion of the bus bar shown in FIG. 1 is folded back into a U-shaped cross section. FIG. 5 is an enlarged perspective view of the switch section shown in FIG. 6 is a view showing the periphery of the terminal holding portion of the switch knob shown in FIG. FIG. 7 is a perspective view of the terminal shown in FIG. FIG. 8 is a view for explaining that the conductive contact piece portion and the bus bar shown in FIG. 1 are brought into contact with each other. FIG. 9 is a diagram for explaining that the conductive contact piece shown in FIG. 1 is brought into contact with the bus bar. FIG. 10 is a diagram for explaining the procedure for assembling the vehicle interior illumination lamp. FIG. 11 is a diagram for explaining the procedure for assembling the vehicle interior illumination lamp. FIG. 12 is a diagram for explaining the procedure for assembling the vehicle interior illumination lamp. FIG. 13 is a diagram for explaining the procedure for assembling the vehicle interior illumination lamp. FIG. 14 is a diagram for explaining that the operation mode of the valve is switched by the pressing operation of the central switch unit by the operator. FIG. 15 is a diagram for explaining that the operation mode of the valve is switched by the pressing operation of the central switch unit by the operator. FIG. 16 is a diagram for explaining that the operation mode of the valve is switched by the pressing operation of the central switch unit by the operator. FIG. 17 is a diagram showing that the lower contact is moved between the contact holding portion of the first lower bus bar portion, the contact holding portion of the second lower bus bar portion, and the insulating holding portion. . FIG. 18 is a diagram showing that the lower contact point is at the position of the contact holding portion of the first lower bus bar portion, the position of the insulating resin peak portion, and the position of the contact holding portion of the second lower bus bar portion. . FIG. 19 is a diagram showing a state of the conductive contact piece in the change in the position of the lower contact shown in FIG. FIG. 20 is a diagram for explaining that the width of the bus bar in the vertical direction or the horizontal direction can be reduced by the amount of folding back of the bus bar at the end. FIG. 21 is a diagram for explaining that the conductive contact piece portion is protected by the bus bar at the three switch portions. FIG. 22 is a diagram showing a modification of the embodiment of the present invention. FIG. 23 is a diagram for explaining the prior art.

  Hereinafter, with reference to the drawings, a preferred embodiment of a lighting switch contact structure according to the present invention and a vehicle interior lighting lamp incorporating the lighting switch contact structure will be described in detail.

(Embodiment)
FIG. 1 is an exploded perspective view of an illumination switch contact structure 1 according to an embodiment of the present invention and a vehicle interior illumination lamp 100 incorporating the illumination switch contact structure 1. FIG. 2 is a perspective view of the vehicle interior illumination lamp 100 shown in FIG. 1 viewed from the indoor side. FIG. 3 is a perspective view of the vehicle interior illumination lamp 100 shown in FIG. 1 viewed from the back side. FIG. 4 is a view for explaining that the end portion 50a of the bus bar 50 shown in FIG. 1 is folded back into a U-shaped cross section. FIG. 5 is an enlarged perspective view of the switch unit 70 shown in FIG. FIG. 6 is a view showing the periphery of the terminal holding portion 76 of the switch knob 74 shown in FIG. FIG. 7 is a perspective view of the end 80 shown in FIG. FIG. 8 is a view for explaining that the conductive contact piece 82 and the bus bar 50 shown in FIG. FIG. 9 is a view for explaining that the conductive contact piece 82 and the bus bar 50 shown in FIG. 1 are brought into contact with each other.

  A vehicle interior illumination lamp 100 according to an embodiment of the present invention is, for example, disposed on a ceiling in a vehicle and illuminates the interior of the vehicle. As shown in FIG. A housing 10 fixed to the indoor ceiling, a lens 30 assembled to the housing 10 so as to close an opening on the indoor side of the housing 10, and an illumination function unit 40 including a light source accommodated in the housing 10. Become.

First, the housing 10 will be described.
The housing 10 is made of an insulating synthetic resin material and is a container having an outer rectangular shape in which the illumination function unit 40 is accommodated. The housing 10 is configured such that the lens 30 is assembled so that the opening 10a on the indoor side is closed.
More specifically, the housing 10 has a switch accommodating portion 11 that accommodates a right switch portion, a left switch portion, and a central switch portion, which will be described later, at a right position, a left position, and a central position along the longitudinal direction of the housing. It is provided side by side.
Each switch accommodating portion 11 has a pair of cylindrical shaft portions 12 projecting from the inner side surface 11a facing each other, and the pair of cylindrical shaft portions 12 provided in each switch portion is a circular opening of a later-described bearing plate portion. It is supposed to be fitted in.

Further, as shown in FIG. 17, the housing 10 has an insulating holding portion 13 formed in a valley shape so as to hold the lower contact 84 at a holding position of the lower contact 84 in a light-off mode of the central switch portion 73 described later. Do it. The insulating holding portion 13 is provided to be next to the second lower bus bar portion at the same height as a first lower bus bar portion and a second lower bus bar portion which will be described later.
Moreover, as shown in FIG. 17, the housing 10 is provided between the contact holding portions of the first lower bus bar portion and the second lower bus bar portion, and is a mountain that forms a mountain between two valleys. An insulating resin peak portion 14 is formed. By providing the insulating resin peak portion 14, the movement of the lower contact between the contact holding portions of the first lower bus bar portion and the second lower bus bar portion is guided.

Next, the lens 30 will be described.
The lens 30 has a rectangular shape corresponding to the shape of the housing 10, and closes the opening 10 a on the indoor side of the housing 10. The lens 30 is made of a light-transmitting material, and light emitted from each valve accommodated in the housing 10 is transmitted to the indoor side. In the lens 30, each switch insertion opening 31 is formed at a position corresponding to each switch housing portion 11 of the housing 10. For this reason, when each switch part 70 is accommodated in each switch accommodating part 11, the operation surface of each switch part is exposed to the indoor side via each switch insertion opening part 31.
Moreover, the lens 30 has the locking wall 32 which protrudes in four places of the back surface 30b. The lens 30 is held and fixed to the housing 10 by engaging each locking wall 32 with each metal clip 16 attached to the housing 10.

Next, the illumination function unit 40 will be described.
As shown in FIG. 1, the illumination function unit 40 can switch the operation mode of the light source by operating a bus bar 50 in which a circuit is formed on a conductive plate member, two bulbs 60 as a light source, and a switch operation. And a switch unit 70.

  The bus bar 50 is assembled to the housing 10 in a state where the valve holding portion 51 and the like are formed on a conductive plate-like member, and thereafter, a separated circuit is configured by a press or the like.

  The bus bar 50 according to the embodiment of the present invention is formed with an end folded portion 53 having a pair of opposed plate-like portions 52 that face each other in the vertical direction by folding the end portion 50a into a U-shaped cross section. The lower bus bar portion 54 formed on the lower opposed plate-like portion 52 of the pair of opposed plate-like portions 52 and the upper opposed plate-like portion 52 of the pair of opposed plate-like portions 52. And an upper bus bar portion 55.

In such a bus bar 50, as shown in FIG. 4 (a), a valve holding portion 51 and the like are formed, and then, as shown in FIG. 4 (b), the end portion 50a is folded back in a U-shaped cross section. Thus, an end folded portion 53 having a pair of opposed plate-like portions 52 facing each other in the vertical direction is formed.
The lower bus bar portion 54 includes a first lower bus bar portion 54a and a second lower bus bar portion 54b that maintain a contact state with a lower contact 84 described later. Each of the first lower bus bar portion 54a and the second lower bus bar portion 54b is separated from each other, and is formed in a valley shape so as to easily maintain the contact state with the lower contact 84. , 54bb.

  The switch unit 70 includes a right switch unit 71, a left switch unit 72, and a central switch unit 73, and is housed in each switch housing unit 11 provided side by side at three locations of the housing 10. The switch unit 70 is a switch for switching the operation of turning on and off each valve 60.

The central switch unit 73 is a switch for switching the operation mode of each valve 60. There are three types of operation modes: lighting mode M1, door opening / closing support mode M2, and extinguishing mode M3.
The lighting mode M1 is a mode in which power supply to each valve 60 is enabled and each valve 60 can be turned on and off by the right switch unit 71 and the left switch unit 72.
The door opening / closing correspondence mode M2 is a mode in which each valve 60 is turned on and off according to opening and closing of each door of a vehicle (not shown).
The light-off mode M3 is a mode in which power supply to each valve 60 is cut off and each valve 60 is turned off.

The right switch unit 71 is a switch for individually performing lighting operation of the valve 60 disposed on the right side of the housing 10 and switching operation to the door opening / closing correspondence mode M2.
The left switch unit 72 is a switch for individually turning on the bulb 60 disposed on the left side of the housing 10 and switching to the door opening / closing mode.

Here, the switch unit 70 will be described more specifically using the central switch unit 73. The right switch unit 71 and the left switch unit 72 have the same contact structure as that of the central switch unit 73, and a specific description thereof will be omitted.
The central switch unit 73 includes a switch knob 74 and a terminal 80 fixed to the switch knob 74.

The switch knob 74 has a switch base 75 and a terminal holding part 76 for holding the terminal 80.
As shown in FIG. 5, the switch base 75 has a substantially rectangular parallelepiped shape and is a portion serving as a base for switch operation. An operation surface 75a that is pressed by an operator when the switch is operated is formed on the upper portion of the switch base 75. The operation surface 75a has a curved surface shape in which both side portions 75b protrude and the central portion 75c is recessed so that the switch knob 74 is swung by pressing and the three types of operation modes are switched.
A pair of bearing plate portions 75e are provided on a surface 75d on the back side of the operation surface 75a of the switch base portion 75, that is, a surface 75d on the switch housing portion side, and a circular opening 75f formed in the bearing plate portion 75e is provided. By fitting a pair of cylindrical shaft portions 12 (not shown) provided in the switch housing portion 11, the switch knob 74 is supported by the housing 10 so as to be swingable.

  As shown in FIG. 6, the terminal holding portion 76 includes a pair of rectangular cylindrical holding pillars 76 a erected on a surface 75 d of the switch base portion 75 on the switch housing portion 11 side. The pair of holding pillars 76 a function as a holding portion that holds the terminal 80. The opposed surfaces 76b of the pair of holding pillars 76a are provided with pinching portions 77 that sandwich each side portion 81a of the held portion 81 of the terminal 80, which will be described later, and the pinched portion 77 described later holds the held portion 81 to be described later. Both side portions 81a are sandwiched.

As shown in FIG. 7, the terminal 80 is substantially T-shaped, and includes a held portion 81 and a conductive contact piece portion 82.
The held portion 81 is a portion that forms a T-shaped horizontal line. The held portion 81 is a portion held by the switch knob 74 by the terminal holding portion 76.

The conduction contact piece 82 is for conducting two contacts according to the operation mode of the light source by a switch operation among a plurality of contacts formed on the bus bar 50. The conductive contact piece 82 is a portion that forms a T-shaped vertical line, and has a bent shape that is bent so as to suppress the spread in the vertical direction or the horizontal direction. More specifically, the conductive contact piece portion 82 has a generally U-shaped bent shape, and is disposed so that the bent portion 83 is surrounded by the end folded portion 53.
As the contact structure 1 of the lighting switch, the conductive contact piece 82 includes a lower contact 84 that contacts the lower bus bar portion 54 and an upper contact 85 that contacts the upper bus bar portion 55.

The lower contact 84 is provided so as to be inclined with respect to the held portion 81 so as to be able to contact the lower bus bar portion 54, and includes a concave contact portion 86 held by the contact holding portions 54aa and 54bb.
The concave contact portion 86 has a concave cross section formed by a bottom wall 86a and a pair of side walls 86b erected on both edges of the bottom wall 86a, and the end portions 86c of each other as the pair of side walls 86b move away from the bottom wall 86a. Are provided so as to be separated from each other.
The concave contact portion 86 is easily held in the contact holding portions 54aa and 54bb formed in a valley shape, and the switch knob 74 is swung so that the terminal 80 is connected to the contact holding portions 54aa and 54aa. When moving between 54 bb or between the insulating holding portions 13, the pair of side walls 86 b are inclined so as to follow the valleys, so that they are moved smoothly.

  The upper contact 85 is a portion that is bent from the lower contact 84 and further extends in the longitudinal direction, and includes a horizontal bent portion 85b that is bent in the horizontal direction at the distal end portion 85a. As shown in FIGS. 8 and 9, the upper contact 85 is formed on the upper part of the conductive contact piece 82 having a substantially U-shaped bent shape so that an upward biasing force can be obtained. It has become. Therefore, the upper surface 85c of the horizontal bent portion 85b is surely brought into contact with the lower surface 55a of the upper bus bar portion 55.

Here, the assembly procedure of the vehicle interior illumination lamp 100 will be described with reference to FIGS. 10-13 is a figure for demonstrating the assembly | attachment procedure of the vehicle interior illumination light 100. FIG.
First, the operator assembles the bus bar 50 into the housing 10 (see FIG. 10A). At this time, for example, the bus bar 50 is positioned at a predetermined mounting position of the housing 10 by associating the set holes 56 provided in a plurality of locations of the bus bar 50 with the positioning pins 15 provided in the housing 10. Yes.

  Thereafter, the operator fixes the bus bar 50 to the housing 10 by welding the positioning pins 15 (see FIG. 10B).

  Thereafter, the worker attaches the metal clip 16 for fixing the lens to the four places of the housing 10 (see FIG. 11C).

  Thereafter, the operator assembles each terminal 80 to each switch knob 74 (see FIG. 12D). At this time, each side portion 81 a of the held portion 81 of the terminal 80 is sandwiched by the sandwiching portion 77.

  Thereafter, the operator attaches each switch unit 70 to the housing 10 (see FIG. 12E). At this time, a pair of cylindrical shaft portions 12 provided in each switch housing portion 11 of the housing 10 are fitted into circular openings 75f provided in each switch knob 74, whereby each switch knob 74 is accommodated in each switch housing. It is supported in the portion 11 so as to be swingable.

  Then, after attaching each valve | bulb 60 to the housing 10 (refer FIG.13 (f)), an operator assemble | attaches the lens 30 to the housing 10 (refer FIG.13 (g)). At this time, the lens 30 is held and fixed to the housing 10 by the metal clip 16.

  Next, using FIG. 14 to FIG. 16, the switching of the operation mode of the valve 60 by the pressing operation of the central switch unit 73 by the operator will be described more specifically. 14-16 is a figure for demonstrating that the operation mode of the valve | bulb 60 is switched by the pressing operation of the center switch part 73 by an operator.

First, a case where a pressing operation for selecting the lighting mode M1 is performed by the operator will be described.
As shown in FIG. 14, when the operator presses the right portion of the operation surface, the switch knob 74 is swung so as to tilt to the right with the cylindrical shaft portion 12 as an axis (FIG. 14B). See), the conductive contact piece 82 is moved to the left of the movement range. Accordingly, the lower contact 84 is brought into contact with the first lower bus bar portion 54a, more specifically, the lower contact 84 is held by the contact holding portion 54aa of the first lower bus bar portion 54a, and the upper contact 85 Is brought into contact with the upper bus bar portion 55 (see FIGS. 14A and 14B), and current flows from the first lower bus bar portion 54a to the upper bus bar portion 55 through the conductive contact piece portion 82. As a result, the current flows corresponding to the lighting mode (see FIG. 14C).

Next, a case where a pressing operation for selecting the door opening / closing correspondence mode M2 is performed by the operator will be described.
As shown in FIG. 15, when the operator presses the central portion of the operation surface 75a, the switch knob 74 is swung around the cylindrical shaft portion 12 as an axis (see FIG. 15B), and is in conductive contact. The piece part 82 is moved to the center of the movement range. As a result, the lower contact 84 is brought into contact with the second lower bus bar portion 54b, more specifically, the lower contact 84 is held by the contact holding portion 54bb of the second lower bus bar portion 54b, and the upper contact 85. Is brought into contact with the upper bus bar portion 55 (see FIGS. 15A and 15B), and current flows from the second lower bus bar portion 54b to the upper bus bar portion 55 through the conductive contact piece portion 82. As a result, a current flows corresponding to the door opening / closing correspondence mode M2 (see FIG. 15C).

Next, a case where a pressing operation for selecting the extinguishing mode M3 is performed by the operator will be described.
As shown in FIG. 16, when the operator presses the left portion of the operation surface 75a, the switch knob is swung so as to tilt to the left with the cylindrical shaft portion 12 as an axis (FIG. 16B). See), the conductive contact piece 82 is moved to the right of the movement range. As a result, the lower contact 84 is held by the insulating holding unit 13 (see FIGS. 16A and 16B), and the current is interrupted by the insulating holding unit 13, so that the current corresponding to the turn-off mode M3 is applied. It is blocked (see FIG. 16 (c)).

  Here, it will be described with reference to FIGS. 17 to 19 that a switch switching sensation can be obtained when the central switch unit 73 is pressed. FIG. 17 shows that the lower contact 84 is moved between the contact holding portion 54aa of the first lower bus bar portion 54a, the contact holding portion 543bb of the second lower bus bar portion 54b, and the insulating holding portion 13. FIG. In FIG. 18, the lower contact 84 is located at the position of the contact holding portion 54aa of the first lower bus bar portion 54a, the position of the insulating resin peak portion 14, and the position of the contact holding portion 54bb of the second lower bus bar portion 54b. FIG. FIG. 19 is a diagram showing the state of the conductive contact piece 82 in the change in the position of the lower contact 84 shown in FIG.

  At the time of the pressing operation of the central switch portion 73, the lower contact 84 is connected to the valley-shaped contact holding portion 54aa of the first lower bus bar portion 54a and the second lower bus bar portion as shown in FIGS. When moving between the valley-shaped contact holding portion 54bb of 54b and the valley-shaped insulating holding portion 13, the conduction contact piece 82 moves over the mountain-shaped insulating resin peak 14 using elasticity. It has come to be. For this reason, a switch switching sensation can be obtained.

  Such a vehicular interior lighting lamp 100 has an end folding portion 53 having a pair of opposed plate-like portions 52 that face each other in the vertical direction when the end portion 50a of the bus bar 50 is folded into a U-shaped cross section. The lower bus bar portion 54 formed on the lower opposed plate-like portion 52 of the pair of opposed plate-like portions 52 and the upper opposed plate-like portion 52 of the pair of opposed plate-like portions 52 are formed. The upper bus bar portion 55 is formed, and the conductive contact piece portion 82 has a bent shape that is bent so as to suppress the spread in the vertical direction or the horizontal direction, and the lower portion is in contact with the lower bus bar portion 54. It has the contact structure 1 of the lighting switch in which the contact 84 and the upper contact 85 contacted with the upper side bus-bar part 55 are formed.

Therefore, as shown in FIG. 20, when the bus bar 50 is folded at the end portion 50a (see FIG. 20B), it is compared with the conventional bus bar 210 without the end portion 230 folded (see FIG. 20A). Thus, the vertical or horizontal width W of the bus bar 60 can be reduced.
Further, as shown in FIG. 21, the conductive contact piece portion 82 is surrounded by the bus bar 50 by the three switch portions 70, so that the conductive contact piece portion 82 is protected by the bus bar 50. Yes.

  The contact structure 1 of the lighting switch according to the embodiment of the present invention has an end portion in which the bus bar 50 has a pair of opposed plate-like portions 52 that face each other vertically when the end portion 50a is folded back in a U-shaped cross section. A folded portion 53 is formed, and includes a lower bus bar portion 54 formed on the lower opposed plate-like portion 52 and an upper bus bar portion 55 formed on the upper opposed plate-like portion 52, The conduction contact piece 82 has a bent shape that is bent so as to suppress the spread in the vertical direction or the horizontal direction, and the lower contact 84 that contacts the lower bus bar portion 54 and the upper contact that contacts the upper bus bar portion 55. 85, the increase in the vertical or horizontal width of the bus bar 50 can be suppressed, and as a result, the increase in the installation area can be suppressed.

  Further, in the contact structure 1 of the lighting switch according to the embodiment of the present invention, the conductive contact piece portion 82 has a substantially U-shaped bent shape, and the bent portion 83 is surrounded by the end folded portion 53. Therefore, the bent portion 83 where the conductive contact piece portion 82 extends in the vertical direction or the horizontal direction can be positioned in the end folded portion 53, and as a result, the vertical direction of the bus bar 50 can be effectively achieved. Alternatively, an increase in lateral width can be suppressed.

  Further, in the contact structure 1 of the lighting switch according to the embodiment of the present invention, the upper contact 85 is brought into contact with the lower surface 55a of the upper bus bar portion 55, so that the tip portion of the contact piece 82 is protected by the upper bus bar portion 55. As a result, it is possible to prevent the conductive contact piece 82 from being deformed.

  Moreover, since the vehicle interior illumination lamp 100 according to the embodiment of the present invention incorporates the contact structure 1 of the illumination switch, the same effect as the contact structure 1 of the illumination switch can be obtained.

(Modification)
Here, the contact structure 2 of the illumination switch which is a modification of the contact structure 1 of the illumination switch according to the embodiment of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view of a main part of the contact structure 2 of the illumination switch according to a modification of the contact structure 1 of the illumination switch according to the embodiment of the present invention. The contact structure 2 of the illumination switch of this modification is different from the contact structure 1 of the illumination switch of the embodiment in that the conductive contact piece 90 has a hook-like bent shape.
Other configurations are the same as those of the embodiment, and the same components as those of the embodiment are denoted by the same reference numerals.
The contact structure 2 of the lighting switch of this modification can have the same effect as the contact structure 2 of the lighting switch of the embodiment.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment of the invention described above, but the invention is not limited to the embodiment of the invention described above, and departs from the gist thereof. Various changes can be made without departing from the scope.

DESCRIPTION OF SYMBOLS 1, 2 Contact structure of illumination switch 10 Housing 10a Opening part 11 Switch accommodating part 11a Inner side surface 12 Cylindrical axial part 13 Insulation holding part 14 Insulating resin peak part 15 Positioning pin 16 Metal clip 30 Lens 30b Back surface 31 Switch insertion opening part 32 Locking wall 40 Illumination function part 50 Bus bar 50a End part 51 Valve holding part 52 Opposite plate-like part 53 End part folding part 54 Lower bus bar part 54a First lower bus bar part 54b Second lower bus bar part 54aa, 54bb Contact holding portion 55 Upper bus bar portion 55a Lower surface 56 Set hole 60 Valve 70 Switch portion 71 Right switch portion 72 Left switch portion 73 Central switch portion 74 Switch knob 75 Switch base portion 75a Operation surface 75b Side portion 75c Central portion 75d Back surface 75e Bearing plate portion 75f circular opening 76 Child holding part 76a Holding column 76b Surface 77 Clamping part 80 Terminal 81 Holding part 81a Side part 82, 90 Conducting contact piece part 83 Bending part 84 Lower contact 85 Upper contact 85a Tip part 85b Horizontal bending part 85c Upper surface 86 Concave contact part 86a Bottom wall 86b Side wall 86c End 100 Interior lighting for vehicle 200 Contact structure of illumination switch 210 Bus bar 210a, 210b Contact 220 Conductive contact piece M1, M2, M3 Operation mode

Claims (4)

A bus bar in which a circuit is formed on a conductive plate-like member, and a conductive contact piece for conducting two contacts according to the operation mode of the light source by a switch operation among a plurality of contacts formed on the bus bar. In the lighting switch contact structure,
The bus bar is
The end part is folded back into a U-shaped cross section to form an end folded part having a pair of opposed plate parts facing each other in the vertical direction, and the lower side formed on the lower opposed plate part It has a bus bar part and an upper bus bar part formed on the upper opposing plate-like part,
The conductive contact piece is
A bent shape is formed so as to suppress the spread in the vertical direction or the horizontal direction, and a lower contact that is in contact with the lower bus bar part and an upper contact that is in contact with the upper bus bar part are formed. Characteristic lighting switch contact structure. The conductive contact piece is
2. The contact structure for a lighting switch according to claim 1, wherein the light switch has a substantially U-shaped bent shape and is arranged so that the bent portion is surrounded by the end folded portion. The upper contact is
The contact structure of the lighting switch according to claim 1, wherein the contact structure is in contact with a lower surface of the upper bus bar portion. In vehicle interior lighting that performs illumination according to the operation mode of the light source by switch operation,
4. A vehicle interior illumination lamp comprising the lighting switch contact structure 1 or 2 according to claim 1, 2 or 3.

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